The Visa's are irrelevant, the louts will still come and misbehave, what's needed is law enforcement, any violent act, vandalism, disrespect to Thai culture equals a big fine and instant Visa revocation with free transport to the Airport for your Homeward flight, ( all Visa entrants must have a exit flight ticket as part of entry requirements ) if your return flight is not for28 days, your in the airport jail till time of departure.
Advertise the rules and consequences for all entrees,
Shows the idiots, behave or you're on the way home and shows the family tourists you are serious about tourism.
Job done.