[skylark]

I'd argue that the UX for up/downvoting is already correct. Vote up if you agree, down if you disagree. It's intuitive and how most people use those buttons.

You can attack this problem from a different angle: Factor the number of reports/flags into the karma calculation and unweight downvoting itself. The report button on Reddit is essentially a "this content is inappropriate" button - why not use it as a part of the scoring system?

[relearn]

It is important that in a system where you have an interaction between groups with differing opinions that neither side has more influence over the rating (score?,metric?) in question. If I agree with a post I can perform the single action of upvoting; however, if I disagree I can downvote _and_ report. This leaves more power in the hands of those who disagree, and would almost certainly be abused.