I would not blink twice at this. Few better ways to weed out the trolls. It would be interesting to devise a way to utilize money and karma in a way that basica

I would not blink twice at this. Few better ways to weed out the trolls. It would be interesting to devise a way to utilize money and karma in a way that basically says, "If you are provably improving the community significantly, this costs you nothing; but if you are average or, worse, a drag, you will pay."