I do put no flame warnings at the beginning of some of my stories, but there is a difference between a flame, and someone being critical. I delete flames, plain and simple. A flame to me is, if the person is outright being negative toward me personally. I had one ass actually tell me I was a failure at life because they didn't like my story. Now that's fucking pathetic and rude. I have only recieved one critical review so far, on this site anyway, and I left it on my reviews, because the person was trying to help. I have no problems with that.
Other than that, I love to rate and review peoples stories, just because I like getting them myself. I would like to know if anyone actually is enjoying my stuff. If I don't like a story, I move on.