I'd spend a point to downvote that comment! (j/k) Actually I like the idea - it would prevent (or at least raise the cost of) karma-bombing. I think the thres

I'd spend a point to downvote that comment! (j/k) Actually I like the idea - it would prevent (or at least raise the cost of) karma-bombing. I think the threshold should be higher than 20 though - maybe 50 or 100. It would probably be best to introduce it at a high minimum and then lower it after observing activity, like pg said he's doing with the polls.