The comments based on academic purposes were welcome not only among the tribunal's cases but also other courts. However, if the criticism was a type of allegations or using abusive words, the persons would be regarded for ruining the national stability because the tribunal judges were state officials, Paiboon said.

Any insult on them would receive tougher punishment than on the ordinary people, Paiboon was quoted by local news network The Nation as saying, adding the police were collecting evidence related to those insulting the tribunal.

The punishment term could be serving seven years in prison, the tribunal head said.

Last Wednesday, Thailand's Constitutional Tribunal gave converse rulings on electoral fraud charges against the country's two biggest parties.

The former ruling Thai Rak Thai party (TRT) was found guilty of breaking election laws and ordered to be disbanded while the TRT's major rival and veteran opposition party the Democrat, has been relieved from the long-term pressure as the Tribunal exonerated it from all electoral fraud charges and warranted it to remain in Thai politics.