Free speech always requires qualifications: to foster a tolerant society you can't tolerate intolerance. Where the balance is, is hard to determine. Will Trump's supporters follow him to a new social network? Will more active moderation stem disinformation and restore civil, good-faith discourse? I don't know if platforms taking a more active role in shaping online discourse will be successful, but I know that it's essential to our society that we keep experimenting to find that balance.