This is a very good point. Ultimately, the comparison between government censorship and social networks' decision to spread somebody's message falls flat becau

This is a very good point. Ultimately, the comparison between government censorship and social networks' decision to spread somebody's message falls flat because of the different baseline: If governments do nothing, there is no censorship. Governments have to decide to take action for there to be censorship. If social networks do nothing, nobody gets to spread their message through them. Social networks have to take action (write software, run servers) for messages to be spread. This difference changes the calculus of moral and ethical responsibility.