PeakD pools upvotes and downvotes in a single "votes" chart. Over half of my total votes seem to go to three abusive accounts I flag. I think if we promote the ownership concept of stakes vests, and encourage people to clean house as part of their activities, it might help. I liked the old Steem Flag Rewards initiative, and maybe some kind of Hive reward pool for responsible downvote curators might encourage more activity with some oversight to protect against abuse?