Most things I'd downvote would be unacceptable in most communities. The bidbot abuse, well, different story I guess, but if most votes were bought, chances are they're earning PAL from a STEEM vote seller, so that just makes the downvote more powerful, meaningful, and hopefully the abuse stops quicker.
This only adds to the confusion though. I wouldn't want to see a slider with 50 options.
That's the thing. the likes of buildawhale don't have any PAL staked. And so if you disagreed with a reward on Steem and chose to downvote, you would be downvoting the post on palnet with the same % which had received 0 vote value from buildawhale 'over there'. The vote could be used to downvote something else :)
Yes, I know it's one big clusterfuck now. LOL!