What's the worst act that you did in your high school years?

I didn't beat up a skinny bully. I regret it to this day.

didn't write a word on one final examination in a subject i didn't like.

Act 2 scene 1 was my worst

When I was 15 I took the family car out for a spin around town while my parents were out of town. I went downtown down a one way street the wrong way, hit a parked car and left the scene. My parents didn't discover the damage to their car till weeks later because it was on the passenger side.

No comment!

Super-glued a fifty pence piece to the dinner queue corridor floor at lunchtime. Super glue was new then and fifty pence was quite a lot. It was funny watching people in the queue trying to pick it up, hoping others didn't see them trying.

Smoked weed my first time and blacked out my sophomore year

I spent too much time socializing rather than studying.