I've suffered at a Oasis gig of a piss throwing idiot, This was by someone who had queued overnight to get a place at the front of the stage, only to then keep pissing in a glass to throwing behind him, He got booted out before the show started. It is now quite common for this act to happen at outdoor gigs and festivals, Wembley who don't allow you to take bottle water in in case you throw it, rub their hands at the act of a near £4 a pint of beer being thrown up in the air.