Asymptomatic » Got New Spam Tactic Figured reports on a new tactic used by blog spammers. Relatively harmless comments appear on blogs that don't contain a single link. When spammers find these comments again via Google, they know they can likely post further comments there—bypassing the filters that automatically approve comments from visitors who have previously had a comment approved under their email address. So it could be that after a "Hey, I think your site is great" comment, a flood of blog spam suddenly appears...