Forum Profile Spamming and How to Stop it

Thread Title:
spammers registering
Thread Description:

Profile spamming, the act of signing up usernames at forums for the sole purpose of gaining the benefit of a link to your website from the profile your new account generates can be a big problem. Anyone that's run even a small forum for some time will tell you it can be a real pain in the arse.

Over at wmw they're discussing ways to thwart the spammers in phpBB - Some outstandign links to mods for the phpBB system and advice from Threadwatch members encyclo and Jenstar - this from Jenstar:

There is a phpbb mod which temporarily disables the website URL field, and if a bot tries to enter something into that form field, it bans the IP and username. The bot doesn't "view" the page and assumes the website url field must be there when it sends the registration information to the server. However, a real visitor would see no form field for website, and instead a note about it becoming active after registration is confirmed.

Good stuff for community admins...