Thatchapong Gaedum, a member of the Network of Students and People for the Reform of Thailand, said the Democrat Party has to make its position clear by refusing to take part in the Feb 2 poll.
If it decide otherwise, the Democrats would be viewed as traitors to the people and they would not be elected as the people would no longer believe what they say, Mr Thatchapong said.
He insisted that the demonstrators had not been rallying on behalf of the Democrats or Suthep Thaugsuban.
He said anti-government protestors do not think the electoral system as a whole is the problem.
"We think it's the quality of the system that's the issue because the richer party always comes out on top," said Mr Thatchapong.
Jeraja Pansak, 55, a supporter of the People's Democratic Force to Overthrow Thaksinism, also suggested the Democrats not send candidates into the general election.
Sticking to her belief that national reform has to take place before the poll, Ms Jeraja said she would not vote on Feb 2 even if the Democrats decide to run for political office.
Anaek Rakbaned, a 41-year-old protester, said the Democrat Party should fully commit to the protest rather taking the risk of losing the election.
The poll should be postponed so that national reform could take place because if there are no assurances that the next government will be legitimate, then spending thousands of millions of baht to hold an election to bring them to power is a waste of money, Mr Anaek added.