^ For example, let's think about Counter Strike. You have more than 15 000 servers in the world. If you play on 1 server, you can find a clan there. You can every time change your nick and it's almost impossible for someone to see what was your former nick. You can change your clans every time on every server and there isn't any person who will care about it.

On the other hand, JJ2 has very much smaller number of servers and players. Everyone knows everyone. If you keep changing your clans you will make your reputation go down. Also if you behave very bad the same thing will happen to you.