That's great for limited circles wherein everyone understands and wants to play by the rules. For the larger public (i.e., Facebook), it's not really scalable without falling into de facto authoritarianism. The "edge cases" in one part of the world might be the voices needed to defend freedom in another, and once you start applying a different set of rules in different scenarios or making exceptions, you've lost impartiality.

My response was directed more at people who avoid public discourse simply because they feel a need to correct people all the time. Funny thing is, real reason and facts don't need justice warriors. Science skeptics, fake news, and conspiracy theorists have always existed. Shouting matches haven't solved any of those problems. With time, wrong ideas tend to die naturally when thoughts and ideas (even wrong ones!) can flow freely and respectfully.