Over 1000 Trackback Spams Today

Trackback spam is becoming a major problem for me.

In the past 24 hours I've had over 1,000 attempts to place trackback spam on this site that have been detected by my trackback software and blocked.

The latest trick seems to be for the spammers to refer to Google, Yahoo.com, and MSN.

I suppose this is because these are genuine sites and they want their spamming IP's to be whitelisted as real trackback senders.

My homebrew trackback software works by visiting the trackbacking URL to see if they really do reference this site. If they don't they are classed as spam. If this carries on they'll chew up all my bandwidth.