diberry - 5:14 pm on Jul 30, 2013 (gmt 0)
Any content written by an anonymous source or written on a site that allows anyone to post without strict fact checking is losing its value in Google's eyes, has been for a long while now.
If that were true, Amazon would not be results 1-3 for every query ever. IMO, Amazon does everything I can think of to make their reviews useful, but I wouldn't call it "strict fact-checking" by a long shot. That would require thousands of staff to manually go through things and interview the commenters via email or something silly. Google, apparently, realizes this and has more realistic expectations than that.