It certainly doesn't match my experience of UK festivals. It is true that alcohol is part of the folk scene to an extent which doesn't seem to be matched in North America - folk clubs and sessions are usually held in pubs, and a festival whicht tried to run with no beer would quickly fold! However the overwhelming majority of festival-goers are good-natured and there for the music, and I have never witnessed any trouble, let alone actual fights. Or actual copulation, for that matter...