There are no rules, no specific guides that will tell you when bullying will happen, but it happens everywhere, in every society. School, work, play.
I used to be picked on a lot at school. Not bullied, but life was pretty miserable when I was in school.
But, what I wanted to talk about today, was how we all have a part to play in bullying. A lot of people watch bullying go by, and they think that it's not their problem. They think as long as they're not the one bullying, it's okay, and they haven't contributed to the bullying.
If you see someone being bullied, you should do something about it. If you don't speak up, you're as bad as the bully. If you want to flock towards the bully, and murmur your assent about how the person deserves it, then you really are a bully-in-accomplice.
You can't sit on the fence on this. Pick your side.