You are right about kooks, but i see often that somebody being a kook or a non-local are equal for most...I don,t like that.
My last holiday at the Canary Islands ive seen a lot of that, dropping in, shouting while I respect the rules and being but just being a stranger and a supper was more then enough to get a few times a week being invited to go for a fight..
Being 188x90kg and very fit+trained kicking ass of a stupid that is smaller as my girlfriend doesn't make sense to me and won,t give me any fun in the waves so most of the times I just try to talk with them or paddle away.
My guess is that his has something to do with warmer water, because everywhere where you need a 4mm wetsuit, cap and booties I never see a attitude like that but rather the opposite, good vibe and friendly approach.
Just don,t behave like a caveman, and if you truly wanna solve it without words, do it at least civilized: take it easy, take a uzzi