It has nothing to do with them being in high school. I play with a few youngins and they are all fine. it more has to do with their personality to began with. My name for the is flickers. The a-hole player almost always throws with a flick (not everyone who throws this is lame, just these specific people are), plays with one disc, regardless of skill, and wears a sideways hat, with a perfectly straight bill.
There seems to be a lot of young a-holes, because so many are inexperienced overall, that they make mistakes that we know not to do, like not yelling clear, or not knowing the distance on their throws.