I would disagree with paddymac's implication that it's money rearing its ugly head that sets off these sort of problems. Sure money is a terrible dangerous thing, but performers' egos and the fight for recognition are all powerful, never mind whether they're doing it for money orlove. I don't think the professionals are any worse than the amateurs. And it's not only performers: the internal workings of voluntary organisations (sporting, charitable, religious etc) are just as red in tooth and claw as any work place!