This isn't really a hacking story but it does remind me of something I did as "revenge."

In middle school, this one fool kept bullying me. Always tried to harm me, always tried to insult me, always tried to make me fall during PE.

I hated him a lot, so instead of trying to kill him as planned, I did a harmless little keylogger prank thing.

I installed a keylogger on the school's laptop before class. (I did it during break, and when class started, I placed it on his desk.)

He took the bait, and instead of doing work, he logged onto his social media accounts. Now I had his passwords and everything.

When I went home, I logged onto his social media. I checked his messages so I can get some dirt on him, didn't find much except for the fact he snuck out a few times, and smoked before.

I changed his profile picture to some cringy anime thing and messaged one of his friends (the one who always copied my test answers in History and would steal my homework) and I said, "tell --- that if he doesn't stop being an asshole, I'll do worse than "hack" his social media."

It freaked them both out a bit, but didn't change their behavior, which is a shame because my threat was empty. It's not like I was able to do anything more than that in middle school. To this day, they still have no idea who did that.

This was about 4 years ago.