Well, take this for example.
We cannot copyright names.
You see, when we go to create a group and everything. If there already is a group with the same name, you cannot make it. It wouldn't be fun if that happened with names. Lots of people will make loads of characters. Eventually become un-active. Then everyone will end up with names like 'Dquiaodm234' or something. So lets just brush off those copiers.