I was the fat class clown in school, but I never got picked on because I was aggressive as hell... I got kicked out of too many schools because of my behavior, almost never fought or bullied people, but was a jerk to teachers and pulled too many pranks.
One day the principal decides to make fun of the fact that my dad was unemployed in front of some other pupils, so I decide to take sweet revenge. He always parked his car in front of the park, which was around the corner. I went buying gloves during lunchtime and picked up all the dog feces i could find and put it in a plastic bag. I returned to his car and smeared all on his car, his windows, his hood, his trunk, all the handles. I waited in the bushes and when I saw him look at his car I burst out in laughter. He went back to school to pick up a bucket and a sponge, and when he was done cleaning he walked back to school. I put a turd under his door handle and when he came back he hit the jackpot. He got into hulk mode and started screaming and yelling and he looked like he was going to have a seizure. I was standing on a safe distance, and he didn't seem to see me, but I almost shit my pants laughing so hard with my friends.
The next week, we repeated the same thing. After that he took the bus for half a year. The day we saw him come back with his car, we did the same thing again.
I can tell hundreds of stories like this.