sounds good and powerfull like "fuck yea" when reading it. but when you think about it disowning exchanges is basically what communism is.

hence may i suggest the social democratic alternative, freezing their stakes, or a transaction sanction, until they resume their non-political role by casting this function in the Steem API:
https://developers.steem.io/apidefinitions/#broadcast_ops_decline_voting_rights

Similar to real world sanctions, it would economically pressure them to release their weapons of blockchain destruction. This should be uniformly applied to all parties operating with the finances of other people, including businesses that were not acting maliciously. Otherwise this would just be a political purge of ideology. This though may or may not displease witnesses like @blocktrades, hence not all witnesses are likely to go along with this idea. Its certainly though a possible outcome within the event space of possible future outcomes.

Having clear rules and customs vs having a majority purge a minority that displeases the majority, distinguishes us from bullies.