three of my friends are in the same 'school' gang-- but it's not some law-breaking group of jackasses kind of gang; they just always watch eachother's backs and swarm fight anyone who messes with a member. They also apparently fight other gangs who try to claim their 'territory', but I've never actually seen this happen :U
since you're a hippy and do not wish to physically harm them, but still want to screw with them, you should
...
idk, I've always resorted to takedowns
ehhh, piss in the halls to mark your territory, that will keep them away