I have PM'd Ken with a link to every one of these Spambot messages. I have also used the "Report Spam" function on every one of them. Yes, I understand that he gets around to them, and removes the bogus accounts, but this thing is persistant and until the powers that be figure out a way to keep it from opening a couple new accounts every day, this will continue to pop up here. The only thing that I can think of to do would be some kind of Verification system where you have to reply to an e-mail or type in one of those Verification jumbles.
It's apparently set up to open a new account, post 1 message here (Don't know if it has found its way into any other forums) then just wait a while and do it again. I only bump this particular thread to push the spam down the list a ways. Otherwise before long, ONLY the spam messages will show in the message list.
If there was more legitimate traffic here, THAT would also help.