Starting from January 2011, there have been problems with fake registrations and spamming of the message board. This was due to the confirmation code to confirm human registrations (using google's recaptcha) now being defeated with some software which allows bots to register. I've changed the confirmation method and I've also temporarily stopped guest posting (which also uses recaptcha).
The new 'captcha' method is actually older so I'm not sure if it is going to improve the situation but I will be keeping an eye on it.
Hello , I haven't logged in as admin for years. I'm planning on doing some work on on the site soon and had to clear up thousands of spam messages and registrations. Currently registrations need admin approval to be on the safe side but hopefully that isn't too much of an issue at the moment as the site has not been active lately apart from all the spammers.