In my opinion bot voting and multiple accounts shouldn't be allowed.
"One person, one account". The blockchain is powerful because it can mediate and allow real people to find consensus and built trust. If you allow fake accounts then it's all useless and we are back to FB and the rest.
How that can be implemented, I don't know.
But for as long as bots are allowed and the Steem whitepaper says, black on white "Eliminating "abuse" is not possible and shouldn't be the goal." (page 15. I disagree, but who am I?) then downvoting people because they have used the system as designed is destructive and harmful
Yep, bit-bots might be to cost of uncensorability. Personally, I would prefer a level of abuse rather than censorship or the need for identity.
But the fact we are having these discusions is the way to aproach this problem :)