I checked out the .ORG site. There were a lot of posts. It was scary.
I'm pretty anti-social by nature, and my brain simply will not relate names and faces to any of the "identity" information my brain stores about them unless I REALLY get to know them. I know a person by what they've posted in the past, not by their name or avatar, usually. It makes it...uncomfortable when someone brings up a conversation from the past and I realize who it is I'm talking to. So a bigger forum scares me.