I was. I'm homeschooled now... because I hated everyone at my school. xD But I did do alot before.
I've: Stolen teacher books, helped a friend steal a microscope, didn't do tons of homework, skipped, plagurized, printed out several copies of homework with just enough changed to prove it was done by different people, cheated on tests, lied about it, came up with elaborate excuses for cheating on tests with friends if and when we got caught, broke a bunch of tiles on the floor, put notes with swearing underneath blaming it on other people("*Swearing*, ___ was here"), chewed gum, broke the dress code, and countless other things.
And that's just the stuff I DID do. Me & a friend who used to go there had tons of stuff planned, including putting eyedrops in the teachers coffee, slashing his tires(well, actually, we ended up just planning on putting nails kinda underneath his tires, so it would be an 'accident'), putting porn on the school computers, breaking in, etc. We never got around to doing them, though.
Never got caught ONCE.
Actually, now that I remember, we had the breaking in one almost done. We unlocked some windows in each building. xD He wasn't able to make it, though.