I am amazed that someone is so intent on messing up Yahoo ratings on this board. Not long ago one of my posts racked up almost 70 ratings in a few hours, most of them apparently negative. Many posts have 20+ bad ratings soon after they appear.
Think about the work involved. Someone is rating each post, logging out, logging in as someone else, and rating the post again. They have to repeat this process multiple times for every single post. If there are 10 or 20 legitimate posts in a day, think about how much time and work they have to put into their vendetta. I can't decide if I should rate every real post 5 stars just to counteract him or her, or just ignore the ratings system altogether.
There are a group of "wormy" people that seek to control the content of message boards with the rating system. I would blame short sellers but they are chasing money. The loser "control freak" is the culprit in my opinion.