I can understand that it's real shitty when you put blood, sweat, tears, and other bodily fluids into your work and people, most of whom don't know who tough it is to put something like a flash movie together, totally rip it to shreds. Personally, I'm sick of the stupid reviews that simply say, "You're a faggot. Die." or any variation thereof. However, anyone that expresses themselves through any kind of art has to learn to take rejection. Not everyone is going to like everything, no matter how good you think your stuff is. This goes for artists, actors, writers, and the like. Hell, I'm aspiring to be a writer and I know that not everyone is going to like the way I write even if I think it's near flawless (well not really).
But going back to NG, what everyone has to remember is that most of comments that say, "You are gay" "You suck and work sucks" "Die asshole" are probably written by pimply faced middle schoolers who do nothing but sit in front of their computer and watch flash movies on NG...that is when they're not jerking off to cheesy internet porn or some dirty movie on HBO.
But what I'm really getting pissed off about is that a lot of flash artists who post on NG are using the defense, "You don't make flash so you can't say anything about my stuff." I don't make flash. I never have. I've tried to learn flash on my own, and I'm actually taking a course right now to learn it...but I will probably never be able to make quality flash. That doesn't mean I shouldn't be able to review other movies as I see fit. =p