As social companies like Facebook, Twitter, and Google (YouTube) increasingly restrict what users can publish according their policies and “community standards”, we must be careful not to summarily dismiss such matters as private companies being free to operate their business as they please, because censorship (violating the First Amendment) is only applicable to state actors.
We must recognize three factors. (1) State actors are threatening to impose regulations or initiate anti-trust enforcement unless these companies self-regulate. Thus, the state is violating the First Amendment coercively through the back door. Or companies are working in cahoots with the government to implement the government’s desired regulations, knowing this is the only way such rules would not be struck down on Constitutional grounds. (2) Large corporations lobby for regulations to establish their own business practices as the status quo and raise barriers to entry for smaller competitors and start-ups. (3) Foreign governments want to enforce their laws and regulations, including against so-called “hate speech”, and corporations will enforce these rules against American citizens. All three are problematic from a First Amendment perspective.