[TrackerFF]

I think a rating system would be highly exploitable. Other than that, people seem to think in extremes. Either it's close to 10, or close to 0. Middle-tier doesn't move anyone, even though most are there...for example, how many times do you watch movies with 5.0 rating on IMDb

[edw]

Additionally, I don’t think such a rating system would work absent some sort of collaborative filtering system. One person’s ten is another person’s zero. That said, if you had a date with a ten, would you want to share that information?