Invite only has it’s advantages and disadvantages. We’ve had people pop up out of the blue with useful resources. I don’t think would happen if they didn’t come across a thread before joining up.
The next forum update ought to make sniffing out the socks much faster. And nobody likes it when Jay calls their parents. 😉
I have no idea if it would be possible to have a segment of the forum in which anyone can create an account and post in, and then if they prove themselves to not be trolls, then they are allowed into the site? Either way, it sounds like you’ve got it under control. Is an IP ban in the works?