Me too. I stabbed a guy in the thigh with a pencil in HS. I was a new kid and sophmore and trying my ass off to make friends. I was talking to a girl, who was friends with his GF. He decided I was after his GF and literally walked up and busted my nose. Guy easily had 75 pounds and 6" on me.
After he got unsuspended, I found him at lunch and stuck the pencil about 3" into his thigh. Told him if he ever touched me again the next pencil went in his throat.
I also didn't get effed with at all after that.
Marine buddy Jaime and I took his 18 year old stepson and his 5 HS friends to indoor paintball last month for the kid's birthday. Another older, fatter, former Marine buddy of ours, Mike, joined us.
We three old dudes, plus J's 10 year old daughter and Mike's 13 year old kid, just took those teens apart game after game. They would go to cover and stick until we flanked and killed them one by one, no shoot and maneuver from them at all, even after we told them what they were doing wrong.
On the way back to town, in between heckling them as Sally's, we were trying to decide if the Marines made us aggressive or if we were aggressive before and thus self-selected for the Marines.