Quote - I'm just wondering why certain individuals here like to post a comment on a render like "Great work!!!!" and then follow that comment with a low rating? What's up with that?

Actually, that is against the Renderosity TOS.  Send a site mail to a moderator and they will look into it.

http://www.renderosity.com/news.php?viewStory=13098

While some instances are accidents, there are some who do it consistently to bring down a person's rating and that is considered "trolling" and "non constructive".

 

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi