I think the problem is there is no rule and any objective standards to follow when anyone try to downvote. Downvoting has misspent by personal feeling or highly subjective point of views. But there isn't any methods to control and correct the misspending and impose any panalties since the steemit foundation wasn't powerful enough. In my opinion, we should find another way to impose any panalties on abusing thier power not by downvoting because even giving same downvoting mana to each account has possibility to creat a innocent victim.