Replying to Serious problem

so i have a serious problem at my school. last week this kid got suspended for having weed at school. within a day, half of my school knows that this one kid told on him. the kid is a total douch and no one likes him anyways. so i just made him feel like shit. so we have closed campus, but lunch sucks. yesterday, i go to jamba juice during lunch, and sure enough, teachers are waiting for me when i get back. i got off easy but i just found out something that really pisses me off. truns out that this other girl who is super shady and no one even notices ever told on us. but she isn't someone that i can just pick on. i really want to tell her how lame that was though. i also want to adress this tred that has started at my school. i would beat the shit outa the original kid but i gotta work with him in math and don't want to start that whole game. suggestions?