Who are those people voting others (well, me for instance) down? I know of a few, but obviously there is a lot of you creeps out there. What's the point? If your intention is to get into some kind of top list yourselves, I'm sure you'll get disappointed. A little bird told me you aren't the prettiest (guys?) around here...
My suggestions to NN:
1. Only let people who have their own pictures vote/rate others.
2. Show a list of those who have rated a photo - if possible with a small photo of the person rating - next to the photo he or she has rated.