Referrer log spam has to be the best kind of spam ever. For $1,000, they’ll add your URL as a referrer in the httpd logs of thousands of weblogs. (They’ve hit me twice.) Right now, the user agent is “Mastadonte Referrer Advertising”, which is pretty easy to filter out; I assume they’ll change that to something that doesn’t give away the game.
The great thing about this spam is that it’s so easy to nullify it. All we have to do is stop obsessively poring over our referrer logs. If we stop caring who links to us, we won’t ever be suckered into hitting one of their URLs. If we stop building those automated referrer display widgets then the spammers get less advertising.
(Yeah, I know, we shouldn’t have to constrain our behavior to avoid spam. It still amuses me that they’re taking advantage of our harmless narcisissm.)
Update: More on this here.