I noticed following type of backlinks while checking backlinks of a website: http://larryconeri9.blogspot.com/2011/01/frankie-edgar-talks-gray-maynard.html http://freidreis.blogspot.com/2011/05/photos-justin-bieber-grammy-night_26.html (check backlinks at the bottom of posts) It looks like they are using old blogs to index low quality pages such as forum profiles. How do they do that? The blogs does not have high quality posts but they are very old. I don't think they own the websites (because of being old) and I don't think that they can hack google websites. May be they are getting passwords of blog owners using brute forcing. Did they really build these blogs 5+ years ago and utilize them to index low quality webpages? What do you think?