More than several links in today's referrers are spam. What kind of fuckhead does this sort of thing? If it keeps up, referrers will have to go... it's too bad.
Later... I had a thought. If I put up a EULA for my site stating that anyone who falsifies their header information must pay me cash, would that work? I'm willing to try it out. Well, if not I may need to implement the same sort of system Mark has.
And later still... How appropriate. Slashdot: The Economics of Spam.