I'll take your word for that here on this site..I never paid much attention since I'm new enough to not be known...lol   The ratings are not as important to me as the learning.
But on ArtZone I know you can rate without commenting and vice-versa..I have never seen a way to delete a rating there...and if I remember correctly..you do have to do them separately over there. ...and yes people have figured out a way to beat the honest ratings..to boost their own images at the expense of much better art.  All you have to do is take a look at some of the stuff in the highest rated gallery at Artzone to see what I mean...
The only problem with AZ is that no one really does either...there is no interest there like there is here, in another's art work.

I guess I really was only thinking about the comments and not losing your ratings...

 

“For those who believe, no proof is necessary. For those who don't believe, no proof is possible.”

[Stuart Chase]