I posted this in VGChartz a few years ago but, when I was in 6th grade, a group of kids got together and would randomly pick a kid out of the crowd on the playground and beat them up for the entire recess. One day, they decided to beat up one of my few best friends, a kid named Michael Weathers. I was asked to join in. Faced with either being the victim of one of these random beatings or joining in, I decided to join in. I hit Michael in the back with both of my knees. When I did, he broke down and cried.
Even then, at the age of probably 11 or 12, I knew what I was doing was horrible. I still feel bad about it to this day. After a few days, the kids got tired of beating up people. Nobody ever got into trouble for it. We should have. Even me.