Designing Learning TechnologyViewpoints along the research to practice trail.Comment spam update- April 22, 2006 Bloggers are quite aware of the problem of comment spam: automated bots that seek out weblogs and leave inane comments that contain links. The goal is to improve the advertised site&8217;s Google PageRank, in addition to providing a few impressions on the weblog. We&8217;ve had this problem under control for several months using a technique called HashCash. We also format all links in comments with the rel=&8217;nofollow&8217; attribute, which prevents Google from using the link in its...http://www.inquirium.net/design2learn/pivot/entry.php?id=166 |