Ok, so I park in my school's parking lot, and for the past 2 weeks or so, on 3 different occasions, some little punk has decided to put his bubble gum in the exact same spot on the black plastic part of my rear bumper, leaving it to sit in the hot sun and bake. We do have cameras outside the school but I don't think they point towards the parking lot. My idea of getting back is to park one day, then wait off in the distance and just watch. Catch, him, and give him a beatdown. However, my school is private and you would get expelled for that. I am planning on telling the dean tmr and seeing what he can do about it. If he catches who did it, they would get expelled for vandalizing. Problem with that is, is that I would find my car trashed within a week either by him, or his friends. I am not sure what I should do. If I could just figure out who is doing it, I could take care of it. Any suggestions?