Totally agree here!!!! I like the idea of rating if it is true and honest!!!!!......like you, I feel that it seems to be a system that is abused, probably because of its anonymous nature. It is fairly clear to me that someone comes along and DOWN-RATES you without any explanation. I see this as just another way in which some individuals are just using the site inapproprately. Everyone needs constructive criticism but anonymous star rating does not allow for this and, after looking around the site, some ratings seem to be out of nastiness rather than a way of helping.
Cheers