Is rel=’nofollow’ a failure?
The argument behind rel=”nofollow” was that spammers were trying to game the system to get link credibility for thier sites. Having a way to flag links that haven’t been human-reviewed so that they don’t count toward PageRank (and similar algorithms) would remove that incentive, and spammers would go away.
Fat chance. You haven’t noticed it here because of moderation (a similar way of enforcing human-review and removing incentive to game the system), but the spammers have already been hammering this site. A 3-second check would show that their efforts aren’t working, but if someone has a bot slamming thousands or millions of sites, apparently it’s not even economical for them to direct their spew–they keep on trying.
Even as the dis-incentives pile on, levels of spam activity increase. Nofollow doesn’t work, because it doesn’t live at the same level where the problem occurs. Comments? -m