with replays yes, they may be.
But if he is selling, then just a lot of bad rating can tell him to lower the price of the head to match.
Since no one is buying replays, rating like those are unnecessary
I don't like empty ratings either, when people just say "7/10" and leave a small useless generic comment (Which i have done at least 4 times when i was tired)
I used to do stuff like that, but not anymore. I'm hoping that if people do start putting more thought into ratings, then people who are rated will learn from that and do it themselves.
Ooops off track.
Of course, more detailed criticism will always be better
I do find it annoying when i get 3 pages of "epic head 10/10 wowowow" and not a single bid though, >.>