We need to put the time before new members can post back. I don't know how long it needs to be to keep these spammers away, but if possible maybe just 5-10 minutes, and possibly give new members a message letting them know why they can't post.
This problem is either a lot worse than I thought it was or it's getting a lot worse. This is nuts how much spam we're getting. Looking through the new posts is getting to be like sorting through all of the crap in my e-mail.