According to the New York Times, Amazon suffered a glitch for about a week that showed the identies of those that had provided anonymous reviews. (See the article.) They made it sound quite common for authors to offer 5 star reviews of their own books and for people to rate their enemies books very poorly. Hopefully, Amazon.com books get enough reviews that one or two don’t sway the overall ratings too much. (I have to say that if I were going to do that something that morally wrong, I’d create a whole new Amazon.com login, not just mark it anonymous!)