This was back in AEP class (girls sec sch)...
- painting a clean sanitary pad with red/black paint to resemble the real thing and putting it in the teacher's table drawer for our form teacher to find... her reaction : open drawer, stare. face turn pale. close drawer. pretend nothing happened.
-at a class chalet, bringing my own speakers complete with bass box, dressing super goth and blasting marilyn manson's antichrist album at full volume just to piss the overt christian kiddies off

it worked
-skipping in-school assembly / events / lessons by hanging out in the toilet and chatting, or throwing wet toilet tissue on the ceiling
-being the only one to ever be sent out of the classroom to stand coz of repeated refusal to hand in homework... snuck off to the public payphone to call up my then-boyfriend instead, he drove right over and whisked me off to the arcades..

-stunning my classmates by showing up at school graduation dressed all j-rock, with my boyfriend in tow... short PVC dress and long black platform boots complete with glam makeup... they could hardly recognize me. I was never popular, but suddenly all of them wanted to talk to me. Particularly happy at the time because it confirmed my suspicions that most of them were superficial frauds and I was right not to befriend them. =x
Ahhh those were the days

Youth sweet youth!