This would only be true if it was someone who was a real troublemaker. But, a lot of forums that banned me, it was simply for political reasons. Sometimes it was because I disagreed, or argued with a mod about political issues. And a lot of times it was because I thought "incorrect thoughts". And on some forums, you can't even say that you don't trust the government. They just call that "sedition" and ban you. On others, if you have the audacity to contest any infractions you have received or if you not only think but actually say out loud that certain rules don't make sense, that gets you on some list. My point: not all rules make sense. Nor are they all fair. Moderators on forums can be wrong. Just because someone gets banned all the time, it's not necessarily because he has behavioral problems.
I admit that a lot of forums banned me for being racist. You will probably think this is fair. But, to me, there is nothing wrong with being racist. In real life, being racist isn't a crime. And if you boil it down to its essence, you will find that being a racist is essentially being nasty to others. It's just in its own special league cause it's "super-nasty", I guess. But being nasty is not against the laws. So why should it be against a forum's rules? And more importantly, why do these forums act like they are the final and only authority on what's acceptable behavior? Why should being racist be punishable at all? Why can't people be racist freely? This isn't even about racism anymore. It's about some people thinking that they and only they alone can make up rules and only they get to decide what's "correct behavior" and everybody else must follow their rules or else. Well, guess what? I am not going to follow their rules, and I am not even acknowledging their rules. I am telling them, through the act of making my own website, that I play by my own rules and nobody else's.
And it's not just about racism. I was once sanctioned for saying "haha" in a thread to someone who defended trannies. I wasn't even laughing at that poster himself or the trannies. Again, I am not saying that forums can't have their rules. I am just saying that according to my own rules of ethics, my own standards of conduct, I did nothing wrong. And if I think some forums' rules are stupid, then yes, perhaps the next logical step for me to take is to make my own forum.