Reviews are fan reviews... but they're also peer reviews.
It won't break my heart if my first story submission gets a lousy rating. I hope the criticism is direct and honest, but nothing more. If I want an ego stroke, I'll look in the mirror and do the Stuart Smally routine. When I look at reviews, it will be to see where I can improve.
Negative and nasty comments will be ignored, so if it gives someone a thrill to make 'em, that's okay. The peer group I'm writing for doesn't really do that, anyways...