I have looked mutch crazy motorbike riding in Pattaya also and did this one use light on his as very many dont.
I was driving in bkk sunday and stopped at red light. There was 3 lanes and a garbage truck windeling between the right and center lane when we wait for green light the garbage truck drive in to my car ripp off my fender and bumper and try to run away but we manage to stop him and call the police. When police come they just take photo of damage and left my incurance Company call for police again as the driver vas, on something and we went to police Office for tests they took only alcohol test that was negative but you could Look he use something. The police not find him for drive on red light not for try to flee and we had all on the dash cam. So moral here is there is one law for thai people and another for forigners.