Originally posted by Nephilim
So, you don't want person X to see certain posts/threads, but if person X joins, then it's fine?

Sorry, but I just don't really see the point.
Actually...

I don't want person X to see certain posts/threads, but if person X joins and posts a couple (maybe 3 to 5) times, then it's fine.

Most of the time, person X will be too lazy or not realize.

It doesn't really matter that much, they can still get to it if they really want to, but it'll deter the lazy & stupid ones.