I remember a few years ago having drinks after teaching at the Uni in Petchaburi. Drank far too much and realised quite quickly that I wasn't fit to drive so went to sleep it off on the back seat.
The next thing I know was a bunch of police banging on the car.
"What you do?"
"I'm very 'mao' so can't drive"
"You can't stay here. You have to go"
"But I'm very drunk!"
"So drive slowly!"
Things are very different here. Much easier to give the cop a 'tip' than finish up in court.