First up, I want to apologize for calling you the Cult of Nice, since I know that freaks some people out. I can't figure out what
else to call the people who disagree with me in this debate because of their firm ideas about niceness and civility. If you've got another name for that position, I'll take it, but all I came up with is Politeness Brigade, which isn't
better.
Second, there's a couple of things implied (or flat out asserted) whenever the debate about concrit/reviews vs. fandom is a nurturing place come out, that are simply not true of my fannish experience nor the fannish experience of, well, those people in fandom who became my friends. So, just to clarify:
1) Critical advice and reader discussion of fanfiction does not generally give its practitioners sadistic glee. Really. No, really. We're not doing this because we enjoy drinking the virtual tears of browbeaten ten year olds. We like reading fanfiction, and we like talking about it with other people. If the only critical advice you've ever seen was abusive or appeared to be for self-aggrandizement, I would suggest that this is because people who would have given you critical advice because they like talking about how to make stories better have been driven to stop giving critical advice by the first 34,234 rounds of this argument.
2) Some of us in the Cult of Mean like hearing negative reactions to our fanfiction, it is true. But there are plenty of us who will feel bad when someone says that our stories are poorly plotted, or the symbolism is anvilicious, or that our fic is ablist. Our stomachs might hurt a little bit, or we may close a browser window in disgust, or we may get on IM and yell at all of our friends to soothe our mental agony. We just don't think that displaying the negative emotional reaction publicly makes us look any
better, and we do think that after we stop feeling deeply wounded, we just might learn something from the negative reactions.
3) We don't believe that every e-mail or comment labeled concrit contains the secret to rev up your sex drive, cure cancer, and get you that Pulitzer Prize. We know full well that you will be better able to evaluate advice from people you know something about than people you've never heard of before. And we don't believe that you are obligated to believe or follow any critical advice, or respond to it in any way. (Well, some of us think you should always respond to feedback, so a "Thanks for letting me know what you thought," may be called for.)
4) We believe one can forge relationships in fandom through critical discussion of fanfiction. These critical discussions are a way we enjoy relating to one another, it is a fun activity for us to share with other people, and, sometimes, if we do it long enough, these people become our friends.
So, we're not looking to hurt you, we don't think we're better able to think about fanfiction than you, we do have feelings, and some of those feelings are (a) critical discussion is fun and (b) people not liking something I did feels bad. Just FYI