40+ years ago I did some dumb things in school as well. But in all cases I got punished by my father. Not because I hurt somebody, but because I wasted a lot of people's time who had to deal with consequences from my actions. I didn't respect other people and their time and it was enough for my father to punish me. And he had every right to do so.

When I was a teacher some time ago some kids did a dumb things as well – they "hacked" schools' computers by putting some really sticky putty under keyboard keys. I wasn't allowed to punish these kids by ordering to clean it after themselves and parents agreed to pay for a new keyboards after weeks of "discussions" with lawyers involved.