We have an upvoting system, where we reward people for upvoting. If you are first to upvote you get more curation rewards. Could the system not work that way in reverse? Where when you the first to flag to flag, you get rewarded to downvote? I understand this problem. I just exposed a fraud and went through a little flagging war. https://steemit.com/ico/@cryptick/6-things-i-learned-exposing-the-aios-ico-fraud