Sigh.. You don't have to join the group. It's optional. The group gives us public exposure and is just another tool along with Twitter for members to interface with the club.
I've been part of the facbook group for some time.
I have never seen info or chat that should be on the forum, that isn't already, so I really don't think that's an issue at all.
Like jmac said, you don't need to join if you don't want to.
It's doing no harm having it there so what's the problem?