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]
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Rich kids. There was a girl in my high school who totalled not one, not two, not three, but FOUR brand-spanking-new BMW 3-series during high school, and her parents bought her a new one each time. Disgusting.