It's probably not worth it, Kyer. Pixy has a really good spam-trackback-IP-eating critter named Snark that automatically kills trackback spammers' IP's much more effectively than we ever could manually.

Most comment spammers are using rotating proxies and have literally thousands of IP addresses available, so you're badly outgunned on that front. (And definitely don't add IP addresses to the Blacklist as they are totally useless there and should not be added.)

Paul

Yep. It's very effective for trackbacks, where we can get hundreds of thousands of trackbacks from a single server, but not worthwhile at all for comments (from what I've seen). And as Paul said, for trackbacks it's taken care of automatically, so you don't need to do anything.

I just banned every IP logged for trackback spam from submitting comments, so we'll see if that helps at all.