A review is a review, good or bad, you put your story up there to be seen and then people give their opinion.
Unfortunately, we cannot predict or shape the way people react to our writing, this actually causes a lot of unneccessary agression and sometimes starts flame wars.
I do understand the frustration of people just "being cowardly" and rating you low just because they don't like you, but whether we like it or not, there are children running around and being immature all over this site, some of which are over the age of 18.
Someday, hopefully, people will become more mature as a whole, but for now we have to just take these things in stride and look to the majority of our feedback for the *real* opinions of our literature.