Do social sites with karma need a decay function?
mseebach: It would seem that the Slashdot system of capping karma at "Excellent" is s means to this end, but Slashdot isn't a better place for it.I'd say, that if anything, down-voting should count proportionally to your karma. If you've got 5k karma, you could go on a flaming-spree for days, and still have more karma than the best newcomers.That said, I don't think it's that big of a problem. When I (and it's seldom) look at a users karma, I always look at it in relation to created-days-ago. Karma 100, created one month ago > karma 200 created a year ago.