Sudchai Boonchai and his family went to the 11th Infantry Regiment (Royal Guard) with a letter and a garland for the army leader and offered an apology for posting the message last week.
The message called for Gen Prayuth's twin daughters to be taken hostage if the army chief stages a coup.
It was promptly denounced by the army as a violation of the general's rights and the bad attitude of a person who reveres violence.
Mr Sudchai said afterwards he did not personally see Gen Prayuth at the regimental compound and instead left the letter and flower garland with a senior army officer.
Mr Sudchai admitted he was at fault and thanked Gen Prayuth for not taking action against him.
Five people claiming to be officials went to his house in Kalasin after the Facebook abduction posting, he said. They did not threaten his wife or son but they have both now moved to Bangkok to stay with him, Mr Sudchai said.
He added that he had only "shared" the abduction message sent by a friend on the social media site.
He denied he supports convicted former prime minister Thaksin Shinawatra but said he is opposed to the Democrat Party and the campaign to shut down Bangkok by the People's Democratic Reform Committee.