Well one solution is to take the reddit approach, where you allow different communities to mostly choose who they want to interact with on their own free will.

Well one solution is to take the reddit approach, where you allow different communities to mostly choose who they want to interact with on their own free will. In twitter's case, one way to do this would be to give users more power over what shows up in their feed, and who they interact with. Perhaps they could allow users to compile their own community block lists. IE, a group of volunteer moderators would compile their own block lists together, and then if you want to subscribe to the "Trump Trolls block list" then you can feel free to do so. And the people who DON'T like your block list, can feel free to NOT subscribe to it, or subscribe to their own "liberal trolls block list". That way everyone wins. The trolls can troll, but you don't have to listen to see them if you don't want to.