Sounds like a claim thread, but anyways.
I graduated '08.
My favorite was finding the code to get onto the school intercom, we went to the middle school computer lab, loaded up Still Dre (uncensored) on youtube...punched in the code, set the phone next to the speakers and walked out...it was great they didn't even know where it was playing from until the last 30 seconds of the song.
We even found out some freshmen's log in to the computer so they couldn't track it to us, and he was their only "suspect" turns out he wasn't even in school that day. haha.