An ambulance tech I got talking to one time told me this tale. There was a man, very well known to the ambulance crews who lived very close to his local hospital, VERY close on the same road.
Well every weekend he'd go into town and get drunk. He'd then call an ambulance complaining of chest pain (which UK NHS ambulances are NOT allowed to ignore) get a lift to his local hospital, immediately discharge himself from A&E and walk the few yards home.
Getting fed up of being used as a free taxi service the techs picked up this bloke one night and, claiming that his local hospital was full, drove him to a hospital some 70 miles away where they had a transfer scheduled. They picked up their transfer but left him stranded.
AS he had discharged himself from THAT hospital's A&E they refused to help with transport. It was estimated it must have cost a good £ 100 to get home.
Never called the ambulance service again.