It is one thing to talk about legislation, which is the creation of laws that everyone must respect or else they suffer legal consequences like jail, ruinous fines, probation and other restraints on their personal freedom, and to talk about curation, or norm enforcement, in which certain expressions and material is deemed wrong for that medium and is curtailed or discarded. Facebook is struggling with this right now. It has declared that it will discard material that supports white supremacy and white nationalist expression. Obviously, the devil lies in the details, as they say. It is likely that some material will be deleted by Facebook that is not particularly offensive, and this concerns those who rely on Facebook for their own free expression, including those whose expressions a reasonable person would NOT find offensive. Facebook is a private company that we have decided as a whole to invest with enormous creative and expressive influence. That comes with thorny problems. What if the expressions of the future become purely digital? If you only have free speech in your vocalized expressions and in face to face encounters, because a private corporation has deemed your digital speech offensive, do you any longer have meaningful free speech? It's a very difficult question.
Neither Media Regulation nor Freedom of Expression are absolutes. Every sovereign nation has its own form of media regulation, even those who are the loudest proponents of freedom of expression, because they recognize that there are some forms of expression that can cause harm when communicated widely through media, such as hate speech, extremism, and calls to violence. To what extent the state regulates media depends on its level of tolerance of expression. In democratic states this level of tolerance should hopefully reflect the level of the citizens, and the citizens in some democratic states (e.g. Asian states) in fact support greater media regulation than citizens of other states (e.g. US, EU) because they prioritize order over freedom of expression. In non-democratic states the state usually seeks to exert control over all aspects of life, of which media expression is only one part.