Yea, this forum gets attacked pretty badly by spammers of all kinds.
I just deleted about 50 spammers that sign up just to post a link in their signature or profile. It's becoming too much...so, I deleted the homepage field and no longer allow signatures, except from moderators and administrators.
I have also changed the CAPTCHA system on the registration page and added some other new anti-spam scripts. And now, private message spam.
Why can't they just leave us alone?