Back in HS, we did stupid shit like write joke DOS TSR virii that had easter eggs like calculators, ASCII tables and random text "screen savers" that didn't respect what you happened to be doing.
Also the computer lab was pure anarchy without supervision: the only rules were don't get the teacher in trouble, don't make 'em look bad and don't kill each other. Somehow, no one got caught hacking into the Pentagon or AT&T.