Has the idea of downvotes costing the user karma points been brought up before? At face value that seems like a good way to limit the amount of impulse or emot

Has the idea of downvotes costing the user karma points been brought up before? At face value that seems like a good way to limit the amount of impulse or emotional downvoting. Most sites require a certain amount of karma to be able to downvote at all, but that addresses a slightly different problem I think. Having downvotes cost something (even if they're only fake internet points) seems like it would limit the idea of piling on. It would really change the dynamic so not sure what the result would be, so I wonder if it's been considered/discussed before? [edit] I should have done my research before asking the question :P Apparently downvoting on S.O. does cost reputation/points. I guess the actual cost is so small it seems to be in the doesn't-matter category, at least for me as I didn't even notice. Perhaps if the cost was higher... [edit2] I looked it up, and the cost is indeed trivial - one point. An upvote on your answer provides 10 points, and you can of course receive many upvotes for a good answer. The cost of downvoting is really only significant for a new/low reputation user. High reputation users can still be poor-downvoters. Seems to me there's a lot of opportunity to tweak the costs of downvoting to reduce the negative aspects of it.