The students who showed the three-finger salute in public against the National Council for Peace and Order (NCPO) have nothing to do with the United Front for Democracy against Dictatorship, said UDD chief adviser Tida Thawornseth on Sunday.
Ms Tida said the NCPO should not impose restrictions against any form of expression.
The NCPO should understand that it is not possible to make 100% of the people agree with it.
"The students don't need to take orders from anyone to show a little sign of resistance. They should not be viewed as forming an undercurrent. Restrictions against their rights and liberties will only backfire," she said.
Asked why the UDD did not join a meeting with the Constitution Drafting Committee last week, Ms Tida said the it would give its opinion and suggestions to the CDC through other channels without having to go to parliament.