I had to divert a flight before because of a drunken passenger in Business Class. When the captain went back to try and calm the man he got headbutted. Flight landed at the local airport, man was in court within an hour or 2. His excuse? Mixing sleeping tablets and booze, claimed he couldn't remember a thing.
I had another one where the crew gave me a heads up that they may need to divert due drunken pax. Few minutes they called back saying there was an off duty cop on board, pax was unconscious and restrained, continuing to dest (about 7 hours away).
I always thought pilots were given cable ties to restrain violent pax? And are pax who cause a divert liable for extra fuel costs/handling fees etc incurred? Because they should be!