I don't think I'm supposed to post this, but as users of that forum, I think people deserve and have the right to know what's going on.
From what little information I've got, I don't think the guys over at Ubisoft knows what's going on much more than you do, except it's a hack. Kleaneasy's account was deleted by hackers. Mods and managers alike have lost their accounts to the hackers. The rabbid-forum was also the work of hackers - They made it, and this and other things make me believe these guys are familiar with the Rayman-community, at least, as I guess this is pretty much what we have been wishing for. Ubisoft has taken it down, and hackers have been putting it up again, which is why it's been flickering on and off, I believe, and I believe all post information in the previous rabbid-forum might be gone forever now (good riddance if you ask me).
They are now trying to clean up the forums, getting rid of some, merging some etc. The Rayman-forum will be left pretty much as it is, though we'll probably have the rabbid-forum back eventually (unfortunately).
As for banned members, the hackers have also been banning people as they feel like, and I've been restoring a couple of accounts, though I'll have to be a bit careful in case someone were in fact rightfully banned. The situation with managers and admins seems to be chaotic, and it hasn't been excactly easy for me to get a hold of them and ask what to do. Sometimes they don't even answer IMs. I'm a bit irritated at that, but they seem very busy right now, and I really can't blame them.
Xeiqu, I've taken a look at your account, which says you have been banned for, and I quote: Involvement in disruptive forum activity. As far as I can tell, you've done no such thing, and this note might as well be old, it's not dated.
Also, you being made into an admin was the work of hackers as well.
Edit: Kleaneasy's account has been restored, it seems. I guess they are slowly solving things.
Edit edit: And I also have to stress that I know very little. This is what little I know and some errr... educated guessing and assumptions made from what info I have.