Well here's my opinion. I felt that I should put it up here too.

If I think an image doesn't deserve a high rating then I do give comments if I feel that it might be appreciated by the artist. And these comments are usually full of ideas to imprve the image, but I just don't put a low rating next to it. But I think that low ratings could be used. But you shouldn't use them to take amateures in my opinion. If you think an image is absolutely tasteless (For instance things like 'nudity-for-the-sake-of-nudity') and you feel that it's hurting peoples feelings or that it just does not fit in this community, than a low rating can illustrate those feelings, but you should always put a comment next to it to make people know why you think the image is a shame for the community.

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