2) The article takes an interesting attempt at being even-handed: "it's not just right-wing Trump supporters who are being evil, but also left-wing Bernie supporters!"
3) The solution that Vox is suggesting is for Facebook to appoint a high council of editors who approve which stories are worthy of being allowed to be shared, and which are evil and duplicitous. For some reason I strongly suspect that the set of stories they want deemed good are those that align with Vox's editorial philosophy.
4) I'm curious how they would handle something like the Iraq war, where the two legitimate sides promoted by serious, responsible folks like Ezra Klein and the NYTimes were liberals who supported a humanitarian war and conservatives who supported a pre-emptive defensive war. How likely is it that the people who should have been banned from public Facebook discourse are those conspiracy nuts who thought the USA should stay out of Iraq?