Effective auto-moderator should check for multiple flags: 1) IP address (if it was banned in the last couple of months). 2) Registration Email address (was it

Effective auto-moderator should check for multiple flags: 1) IP address (if it was banned in the last couple of months). 2) Registration Email address (was it banned in the past?). 3) Buzzwords (how frequently that word was used by banned accounts in the past) 4) Web sites (was it banned). 5) Age of the account (the younger - the more likely it's spam). Based on all these red flags auto-moderator should calculate overall "spam rating", and above certain threshold accounts should be deleted automatically. All key attributes of deleted account (IP, email, buzzwords) should be analyzed to train automoderator to recognize new spam). We implemented such system and it automatically deletes most of spam: http://postjobfree.blogspot.com/2009/06/postjobfree-automoderator.html http://postjobfree.blogspot.com/2009/06/postjobfree-automode...