Good points. Yes by cancelling out I do mean counteracting their vote. At the end of the day, the main solution is to have more good actors outweighing the bad ones.

A DAO only votes on the majority vote of their users. They aim in further decentralization and have been promising thus far in Ethereum.

Banning someone's account is censorship. I don't think blocking someone from the ability to comment on your own posts is necessarily censorship. A third party stopping someone from being able to see someone else's posts definitely is censorship.

It sounds like PeakD's communities are doing this, and I don't see any major backlash against them for deploying a "censoring" solution, so will take a closer look at them.