The norm I was referring to was probably more the general Friday/Saturday night provincial 'lads' that go out, get hammered and fight. That particular section of society tends to be drawn to football rather than rugby or lacrosse, and these issues always become exacerbated around big international tournaments.
I think that alcohol fueled anti-social behavior is much more prevalent in the UK than I have seen/heard about in the US. The drinking laws for under 21's are much more strictly enforced here whereas a lot of blind-eyes are turned to underage drinking in the UK - it's encouraged in some families lol!
Of course you and your whole family can be shot dead by a 15 year old over here so swings and roundabouts and all that.