Personally, I think the guest visibility should apply only to the Start Here and Sonic The Comic subsections. It's all visitors need to see, really, as these sections relate to the running and rules of the board and the comic itself respectively. The rest is just general community stuff that should really be an option. It's all I saw when I first joined, as far as I remember.
There are three things I try to live by:
1) Never tell a bride the day before her wedding day that "there is a problem"
2) Nothing good happens after 2AM - just go to bed.