If you don't have a job, limited money, and social life is difficult, the internet has obvious attraction.
Once I was able to describe this pattern to myself and recognize it in myself, I started trying to reduce the amount of posting I did that expressed "I'm right and you're wrong". Because no matter how right a person is, it's generally more of a selfish activity to tell other people about our rightness than we want to admit. If positive interaction is a goal, being right does not excuse telling people they're wrong.