I was in a lot of groups back then. The rockers, baseball players (Which yes, is different than the other jock groups), the party guys, and the JROTC group. As you can guess I never really got any trouble from anyone when I was in high school but there still were people I hated, mainly....
[spoiler]The Soccer players with a superiority complex because they think they're more culturally exposed than everyone else simply because they play an international sport.[/spoiler]
-
As you get older, people tend to give less of a shit in regards to alignments/groups, so I didn't really hate anyone at the end of my school career. But the cocky little first years grind my gears. When I was their age, I never even considered disrespecting the seniors. Now it seems that's all they do.