Since its enthusiastic adoption a year and a half ago, by Google, Six Apart, WordPress, and of course the eminent Dave Winer, I think we can all agree that nofollow has done…nothing. Comment spam? Thicker than ever. It’s had absolutely no effect on the volume of spam. That’s probably because comment spammers don’t give a crap, because the marginal cost of spamming is so low. Also, nofollow-tagged links are still links, which means that humans can still click on them–and if humans can click, there’s a chance somebody might visit the linked sites after all. Heck, if we really wanted to eliminate comment spam, why don’t we just get rid of hyperlinks altogether?
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