Just my 2 cents. I come here probably 3 to 4 times a week at most. I’ve posted some crap which in the past I’d be rather embarrassed about. But, I’m really not. I think it just tells me I need to work more diligently and study others’ work more. It was said that “it’s just like life”. I mean, they told Speilberg he sucked back at film school. That may very well have been true at the time. But, look what happened. It either affected him in such a way that he wanted to improve, and did immensely… or he really did have that “something” that others in his immediate circle didn’t really have the eyes to see. He just kept building on it. In any case, I’d look at it as an opportunity and focus more on cultivating my work.
As with anything, it would seem, the insults will come from wherever they come. I’ve experienced this in a few different artistic, as well as musical endeavours. Some critiques you can respect and indeed learn from, others you simply ignore. It’s my landscape. I’m just going to enjoy the adventure. If others get joy from it, hey… that’s cool too.
As far as the rating system… I personally could care less. Don’t get me wrong though, it would be nice to see something of mine go toprow but, that’s certainly not my goal and I know I’ve got a long way to go. Besides, no matter how good you are… there’s always a bigger fish that’ll come along and eat you. 
EDIT:
I actually meant George Lucas, not Spielberg. Dunno why I always attach the two. Must be the Indiand Jones thing they did.
Basically what I was trying to say was, follow your own vision. Forget about ratings and negative things said about what you enjoy doing. Remember, some of those things you think are negative are actually positive. Even if you don’t agree, they end up affecting what you do and how your work progresses. Adversity is good fuel. You either use it or it just blows up. 