Think about the types of speech and expression that were, in fact, banned in the U.S. in previous generations. At the end of WW1, the sedition laws put many to jail over comments that seem innocuous today. In the fifties, even after McCarthy was gone, there were laws that required "communists" or sympathizers to register as such. Labor rights/civil rights activists like W.E.B. DuBois even registered just to be safe. Same for history teachers and college professors who taught twentieth century history that included Marx, Lenin, Stalin, etc. In the sixties, pornography and mild swearing were crimes; look up Lenny Bruce over his delivery in an age-restricted night club. Courts have ruled for free speech, but suppression might still be possible if restricted to certain times, places and contexts.