The government has warned against any attempt to stir up political unrest with a gathering being organised at the scandal-plagued Rajabhakti Park in Prachuap Khiri Khan.
Government spokesman Sansern Kaewkamnerd said everyone is free to visit the park, but they must also ensure no one has ulterior motives.
He said he believed the entire country is aware of what a politically-motivated gathering aims to accomplish.
The spokesman is understood to be referring to a planned trip by a pro-democracy student group calling itself Prachathipatai Sueksa (democracy studies) to visit the park, apparently to shed light on some of the fraudulent schemes put in place during the construction of the park.
He said he was certain most people were fed up with activities set out to cause disturbances.
"If they [the group] are there to break the law or ruin the peaceful state of the country, they will have to face legal action.
"They should be warned never to smear, with their dirty minds, the park that has been built with the faith and loyalty that all Thai people have for the monarchy.
"Everyone, except those with the foul intention to destroy the nation, should visit the park at least once in their lifetime," he said.
The student group, led by Sirawith Seritiwat, a political science student at Thammasat University, plans to visit the park by train today.
Describing the visit as a study trip, the group said it hopes its field visit will yield facts about the park's construction. They will also proceed to read a statement to reveal problems surrounding the park controversy.
Mr Sirawith has claimed previously that soldiers in Klong Sam Wa district of Bangkok had contacted him saying they would come to meet him at Thammasat's Rangsit campus and take him to a military camp for "talks" if he kept stirring up trouble.
He said he told them he would not agree to go to the camp because they might detain him and prevent him from travelling to the park as planned.
Responding to the fuss, the Thai Lawyers for Human Rights group has accused the military of overstepping its authority allowed under the National Council for Peace and Order's order No 3.
It authorises security officials to summon people for questioning only in cases of suspected acts of lese majeste, internal security infringement, illegal weapons possession or violations of instructions of the National Council for Peace and Order (NCPO) or its chief.
Mr Sirawith's plan to visit the park does not fit any of the conditions, the group said.
Maj Gen Srisak Poonprasit, chief of the 2nd Infantry Division, Queen's Guard, confirmed Phatnaree Chankij, mother of Mr Sirawith, was invited in for talks.
She was asked to cooperate with security authorities by persuading her son not to stage any move for the sake of maintaining peace and order.
However, he insisted his mother was not detained and she left after the talks Sunday, he said.
Last week, the authorities announced they have relaxed their monitoring of key red shirt leader Nattawut Saikuar to avoid surveillance becoming a political issue.
The NCPO spokesman Winthai Suvaree said authorities will cut back their surveillance of Mr Nattawut and other individuals thought to be critics of the government.
He had earlier complained the army was making repeated visits to keep an eye on his home.
Surveillance would be kept at appropriate levels to prevent it from being capitalised on by critics of the NCPO.
The spokesman said the red-shirt leader may have speculated on issues with the intent of confusing people. Col Winthai urged people to be wary of information that had come from certain sources.
Last week, five red shirt leaders, including Mr Nattawut and co-leader Jatuporn Prompan, were detained by soldiers while on their way to visit Rajabhakti Park.
