>>40
I don't know. Look at the ratings on Amazon, or moderation on Slashdot-alike sites. Based on that, I have almost no faith in the rating abilities of people.
Then there's the problem of ballot stuffing. If you're truly anonymous, there's no way to prevent it. Trolls will have a field day, while normal people will be too lazy.
I think the Japanese have beaten us to an ideal Anonymous system. It has its problems, but you're not going to get much better. Ratings are overrated.