sexgod
What I would do is creat a new group like jailed then create a new catigory then make your "jailed" forums (so that only the "jaild" group will see it) in the new catigory. then you will need to edit the users groups and place a check mark in the new group. Also edit your admin account (or your main account) and check the new group so you can keep an eye on that forum at the same time it will be invisabe to every one else.
I did the same thing but it is a "teaser forum" to get people to redgister. I got that idea from Joshpet on his test board.