Some other forums have things called user groups, and most of you should understand what I'm talking about. Basically, a user can join some groups at any time, and other groups only upon invitation. So it would be cool if these forums had these user groups. For example, if there was a user group of aliens, then, if the user group was set up this way, you could join only by invitation. And the person who starts the user group invites people, but I would say any user-created groups should be all-inclusive. Only a moderator could create a invitation only user group (for example, GLADE Team Member).
I would say that there should be requirements for a user to be able to create their own user group. They should have to have at least 250 posts and have been a member of the forums for at least six months.