I think it would be worth taking a look at the Slashdot voting system, which IMO...

snowwrestler on Aug 20, 2012 | parent | context | favorite | on: Why I now, unfortunately, hate Hacker News..

I think it would be worth taking a look at the Slashdot voting system, which IMO does the best job I've seen of getting the best signal out of the noise of mass voting.