A friend of mine returned from Bangkok to Surin on Apr. 24. The only thing out of the ordinary was that, as he left the bus, he was asked to provide his name and phone number. This was presumably to notify him if any of his fellow passengers turned out to be Covid positive. It was not required, or even suggested that he quarantine.
Anyone who obtained a bogus visa should not be too surprised if lightning doesn't strike the same place twice.