The absolute best prank I've ever heard of I only heard about secondhand. The person telling me swore it was 100% true, however.
When he was in college one of his friends turned 21. Most of his friends took the guy out to get him good and hammered, while 2 stayed behind "to study." So while they are out getting this guy as drunk as possible, the 2 stragglers go to his dorm, which has that fake wood paneling that was so popular in the late 70's early 80's, where it's one big thin sheet of wall covering like 10foot square or whatever. Anyway they take the frame off the baseboard and from around his door, take the doorknob off completely, and remove that whole section of wall. Because this fake wood crap is so cheap and people damage it all the time, there was a maintenence closet with replacement pieces, and they took out a brand-new piece and covered the door to his room, making it look just like a hallway wall. They even had a replacement piece of baseboard.
So this poor dude stumbles home that night, drunk out of his mind, and his dorm room is just gone.
I believe it's time for mankind to set aside the crutch of religion and embrace morality born of reason and truth. Those crutches have long since proven treacherous when the ground gets slippery.