These are just some random theories and observations that came back to mind due a number of situations on and off the internet.
1. There are some people that aren't happy unless they are complaining. I get tired of it and disregard a lot of what the person says. On any of the forums I'm on if I notice that someone who complains a lot has posted to a thread my first thought is to wonder what they are complaining about now. It leaves me wondering, do they realize that other people are thinking things like that and is that really the sort of reputation they want to have?
2. There are people who like drama and like to be the center of attention. It's important to learn how to recognize them so you can keep from getting caught up in their stories and drama but they are interesting to watch so it doesn't hurt to stay in the area. Just make sure you're a safe distance away.
3. One of the most important things to learn is when it is a good idea to walk away from something, especially heated discussions.