The recent move by the National Anti-Corruption Commission to seek lifetime political bans for 44 opposition MPs, accused of a "gross ethics breach" simply for proposing to amend the royal defamation law, underscores how the boundaries of Thai politics are being redrawn in real-time. This investigation into lawmakers for their legislative actions serves as the latest flashpoint in a transformation of public discourse that has undergone a striking shift since 2019.

Once largely absent from open debate, the issue of the monarchy has gradually entered public, activist, and even parliamentary spaces. This shift has not followed a simple trajectory toward openness. Instead, it reflects a complex interplay between expanding expression and intensifying legal enforcement, which continues to define the limits of what can be said.

At the center of this tension is Thailand’s royal defamation law, commonly known as Section 112, which has been used to prosecute activists and critics of the monarchy. It is not only a tool of punishment but also a mechanism shaping public discourse itself. The result is an evolving, contested space where speech about the monarchy is simultaneously more visible and more restricted than before.

Breaking Long-Standing Taboos

The turning point came in 2020, when youth-led protests fundamentally altered the landscape of political expression. Student activists, many of whom had grown up in a digitally connected and politically aware generation, began openly addressing the monarchy in ways that had rarely been seen in public.

A defining moment was when student activists issued a 10-point manifesto calling for reforms to the institution during the 10 August 2020 protest at Thammasat University. The public reading of these demands marked a historic shift: criticism of the monarchy, long confined to private conversations or coded references, entered the realm of collective, visible political action. It was also the first time that the 2020 student movement issued a direct demand for monarchy reform.

The Constitutional Court would later ruled that the calls for monarchy reform and monarchy-related activities were and will be considered treason and an abuse of constitutional rights and liberties.

Protest sites became spaces not only of dissent but of reimagining political language. Demonstrators used speeches, performances, and symbolic acts to communicate their demands, while social media platforms amplified these messages far beyond physical gatherings. What had once been unspeakable was now being spoken, directly, publicly, and by a new generation.

This expansion of discourse did not occur in isolation. It reflected broader frustrations with political structures, economic inequality, and limitations on democratic participation. Yet the monarchy quickly became a focal point, both as a symbol of power and as a boundary that activists sought to challenge.

The rapid expansion of public discourse was soon followed by a decisive legal response. In November 2020, authorities resumed the use of Section 112, which has been rarely enforced since 2018. This marked a turning point in the state’s approach to the protests and to public discussion of the monarchy more broadly.

According to Thai Lawyers for Human Rights, the number of individuals charged under Section 112 and related laws has risen significantly since late 2020. Those affected include not only prominent protest leaders but also ordinary citizens, many of whom face charges for online expression such as social media posts, shares, or comments.

Meanwhile, because the law allows anyone to file a royal defamation complaint, many ultra-royalist groups have been filing complaints against ordinary netizens and pro-democracy activists. In several cases, the accused are forced to travel to other provinces

Section 112, categorised as an offence against national security in the Thai Criminal Code, carries a prison sentence of 3 – 15 years. In several cases, courts have handed down lengthy prison sentences, showing that the Thai authorities treat royal defamation as a serious offence and leading to criticism from human rights organizations and UN mechanisms that the sentences are disproportionate.

The rapid expansion of public discourse was soon followed by a decisive legal response. In November 2020, authorities resumed the use of Section 112, which had been rarely enforced since 2018. This marked a turning point in the state’s approach to the protests and to public discussion of the monarchy more broadly.

According to Thai Lawyers for Human Rights (TLHR), the number of individuals charged under Section 112 has risen significantly, affecting not only prominent protest leaders but also ordinary citizens. Between November 2020 – February 2026, at least 291 people have been charged with royal defamation for political expression and participation in protests. As of 14 May 2026, 35 people are imprisoned for royal defamation, 14 of whom are detained pending trial or appeal.

The sentences handed down have frequently been criticized by international human rights organizations and UN mechanisms as being strikingly disproportionate to the acts committed.

Key cases that illustrate this escalation include:

• The Longest Sentence in History: In January 2024, the Appeal Court sentenced Mongkhon "Busbas" Thirakot, an online clothing merchant and activist, to 50 years in prison for Facebook posts. Although the Supreme Court slightly reduced this to 46 years in early 2026, it remains the harshest sentence ever recorded for royal defamation.
• Targeting Netizens: In March 2024, a 26-year-old netizen known as "Maggie" was sentenced to 50 years for 18 tweets, a sentence that was halved to 25 years only because she pleaded guilty.
• The Case of Anchan Preelert: For years, the record for the longest sentence was held by Anchan Preelert, a former civil servant who was sentenced to 43 years and 6 months in 2021 for sharing audio clips on social media. Her case became a global symbol of the law's severity; she was finally released in August 2025 after serving approximately eight years, following a royal pardon.

The legal response has not been limited to Article 112. Other provisions, such as Section 110 (concerning threats against the Queen), have also been invoked. This multi-pronged legal strategy suggests a broader intent to regulate and contain discourse. For many activists, these ongoing legal battles consume time, resources, and emotional energy, while the risk of decades-long imprisonment has created a profound chilling effect across Thai society.

Many activists involved in the 2020 movement now face ongoing legal battles that consume time, resources, and emotional energy. Some have been detained for extended periods while awaiting trial or appeal. Others sought refuge abroad, only a few of whom continue their advocacy in exile. Their absence has reshaped the movement, reducing its physical presence within Thailand while expanding its transnational dimensions.

The intensification of legal enforcement has had a chilling effect on the pro-democracy movement, with mass mobilization declining over time and public discussions about monarchy-related issues becoming less visible as individuals weigh the risks. Public demonstrations become smaller, and while online spaces continue to play a crucial role, they are subjected to surveillance and potential prosecution. Journalists, academics, and ordinary citizens alike navigate a landscape in which the boundaries of permissible speech are both unclear and strictly enforced.

From Streets to Parliament: Limited Institutional Debate

While activism has faced increasing constraints, discussions about the monarchy have also surfaced in institutional settings, particularly in parliament. This represents one of the most significant shifts since 2019: issues that were once entirely excluded from formal political debate are now being raised, albeit with severe consequences.

The primary driver of this shift was the reformist Move Forward Party (MFP), the successor of the Future Forward Party previously dissolved in 2020. The MFP won the 2023 general election on a platform that included amendments to the royal defamation law but was unable to form a government despite winning nearly 14 million votes because it was unable to gain the support from senators for its candidate for Prime Minister.

MFP MPs have attempted to address topic previously considered “off-limits,” such as the transparency of budget allocations for royal agencies and the accountability of the institution within a constitutional framework. In 2021, 44 MPs jointly backed a bill proposing amendments to the royal defamation law.

However, these efforts were not without substantial obstacles and consequences. In January 2024, the Constitutional Court ruled that the MFP’s campaign to amend the royal defamation law was treasonous, prohibiting future campaigns and amendment through any means other than “the lawful legislative process.” This ruling eventually led to the MFP’s dissolution and a 10-year ban from politics for its leaders.

Even after the party's dissolution, the legal pressure has intensified. As of April 2026, the Supreme Court has accepted a petition against 44 former Move Forward MPs, many of whom are now prominent members of its successor the People’s Party. These individuals are being investigated for gross ethical misconduct for backing the 2021 bill to amend Section 112. If found guilty, they face lifetime bans from political office.

This transformation highlights a stark paradox: while the monarchy has entered the realm of parliamentary awareness, the state has refined its legal instruments to ensure that such awareness cannot lead to policy change. The contrast between the boldness of the 2020 student movement and the current defensive posture of parliamentarians illustrates that the "unspeakable" is now spoken within the halls of power, but only at the cost of one's political life.

Adaptation and the Persistence of Discourse

Despite the constraints imposed by legal enforcement and institutional limitations, discourse surrounding the monarchy has not disappeared. Instead, it has adapted to changing conditions.

Activists and citizens have developed new ways of expressing their views, often relying on indirect language, symbolism, or coded references. Cultural forms, such as art, music, and satire have become important mediums for communication, allowing messages to be conveyed in ways that may be less vulnerable to legal repercussions.