Lt Gen Paradorn said the government must explain to the protesters that it is illegal for them to join the PDRC's protest.
He said the "feed" pipeline to the PDRC is at a trickle after being blocked by the authorities. Capital groups which support the PDRC have also been affected by the fact that the rally sites are in their own business areas.
It was believed the PDRC's pipeline would be completely blocked before Songkran, he added.
The NSC chief said the Centre for Maintaining Peace and Order (CMPO) had summoned executives of the Dusit Thani Hotel and Intercontinental Hotel in Bangkok for questioning on Feb 11 over providing accommodation for PDRC leader Suthep Thaugsuban.
It was believed that after being questioned, the businesses would no long do anything to break the law, he said.
On the launching of M79 rounds at the PDRC's Chaeng Wattana stage on Feb 6 and Feb 8, Lt Gen Paradorn said it was quite obvious that the attacks were the work of a third-hand party who might have been affected by the protest led by Luang Pu Buddha Issara, who is now wanted under an arrest warrant.
He believed the Chaeng Wattana rally site would eventually be disbanded because it was prone to untoward incidents and the people wanted the government offices complex to reopen for public services.