Why did you add the P.S.? As far as I've seen, everyone in these forums are nice people.
Anyways, I agree, there are way too many user groups. And could you clarify something, are you suggesting this user group for the forums? Or some sort of medal or something in game that says beta tester? Because from past experience, for these servers, most activity goes on in game. And most of the people who will use the forums are the dedicated people, such as the beta testers themselves. So it would be like putting a badge on every single person in a room saying they're special. Except they won't be special because everyone is "special". Know what I mean? So I think that this beta testers user group is cool, except it should be incorporated to the game itself, where everyone can see and appreciate them.