A suit in federal court  is challenging whether Donald Trump, as the most Twitter-reliant president yet, can legally block people from his feed. At the same time, Twitter may start flagging Trump posts that violate its policies, and adding notes to explain why. All this conversation  prompts a question about what social media would be like if we all had  to take  responsibility for the stuff we post on social media, and what the Internet might be like. Give a listen, then let me know what you think.