I laughed so hard reading this topic today :laugh:
I don't think I did anything THAT evil (gang kid, bottle jizz, taco jizz [c'mon, too much on the stories :laugh:], the dildo glued on the car lol, all of them)
I used to say "let's see who walks faster with shoulders against one another?", then me and a friend stood side by side and started walking very fast, when it was almost running, my last step was exactly on the way of their feet, and they usually fell on the floor very badly lol
Or there was a time, in school, where in a party me and a friend invented there was a "ghost" in the kids playground, that was in another ground level and all lights were turned off and it was at night. There was something swinging on the tree, like a branch, we said it was the kid's foot, and people suddenly started to see a head, and a boy, something very creepy. Using the best of their imagination, we started expanding the myth, saying "look, he is sitting on the tree, swinging his foot!". Suddenly, lots of people of the school started stopping to see the "boy", they were really believing there was someone there, and a crowd gathered there.
Well, that's not the mean part, I wasn't even responsible for the mean part, but a security guy thought the "ghost kid" was a gatecrasher, and this idiot just said one of the students was the intruder, and did a "rear naked choke" on the boy, and was a mess.
Also, I used to choose people that were hot headed and could enter into a discussion. I gathered some devils to do the job too, and a bunch said "x" to one and "y" to other, considering "x" and "y" are things like "he called you this...", "he is telling this about you". I can't believe they felt into the trap.
But nothing reaches the level of things I've read here.