Red-shirt leader Jatuporn Prompan has begun a Facebook war with rival Suthep Thaugsuban over the draft constitution and challenged him to a debate.
The charismatic chief of the United Front for Democracy against Dictatorship (UDD) made his first appearance in a Facebook Live video on Saturday, one day after Mr Suthep launched a planned series of pro-charter video pitches aimed at people voting in the Aug 7 referendum.
The Muan Maha Prachachon for Reforms Foundation chairman is appearing live on Facebook at 2pm every day and now it is Mr Jatuporn's intention to follow him 30 minutes later with a counter-argument.
The foundation is the successor to the People's Democratic Reform Committee (PDRC), the Suthep-led movement whose street protests paved the way for the ouster of the Yingluck Shinawatra government in a military coup in May 2014.
Mr Jatuporn promised in his daily programme on Peace TV on earlier on Saturday that he would speak for around six minutes on the new show on Facebook Live. He kept his word, almost, as his debut was just one minute longer than he had promised.
He thanked the former Democrat Party strongman for giving him a chance to speak his mind. "He talks every day, so that does it," he said on Peace TV. "I'm sure that it's not against any law.
"It's not about engaging in conflict. It's about expressing different views (on the charter)," he said on Peace TV and challenged his rival for a debate on the issue. "Let's meet one- on-one, not for a fight but for a debate."
Next up in the lineup on Facebook Live for the red shirts are secretary-general Nattawut Saikuar and former leader Tida Tawornseth, according to Mr Jatuporn.
Mr Jatuporn used his debut on Facebook Live to reiterate the stance of the red shirts against the charter, which they say has been written to strip power from people.
In his second appearance on Saturday, Mr Suthep vowed to vote for the charter, saying he had confidence that it would bring about reforms, one of the issues at the heart of the formation of the PDRC.
The online charter war could give the National Council for Peace and Order and the Election Commission another headache.
The much-criticised referendum law bans public comments that could sway opinion for or against the constitution. Only messages encouraging people to vote are allowed. However, so far the law is being enforced only in the physical world, with arrests of people handing out "Vote No" leaflets for example.
In the virtual world, anything goes, or so it seems. Two weeks before Mr Suthep stepped before the camera, 17 Pheu Thai politicians issued anti-charter statements on their Facebook pages. The government remained silent about whether they would be prosecuted and the Election Commission, which is supposed to enforce the law, has taken no action.