What affects me is the one time I bullied.

I know what you mean here. :( In my primary school, there was one girl who had a lower status than me. I discovered some embarrassing information about her, and I told everyone. I still feel horrible about that to this day. The worst thing is, she never found out that I started the rumour.

I have read that teaching philosophy in schools reduces bullying -- basically, if kids learn to THINK, they're more likely to think about others and how they feel.