Posted more for my own reference, as I still see people quoting “fire in a crowded theater” while advocating for censorship.

It’s Time to Stop Using the ‘Fire in a Crowded Theater’ Quote

In 1969, the Supreme Court’s decision in Brandenburg v. Ohio effectively overturned Schenck and any authority the case still carried. There, the Court held that inflammatory speech–and even speech advocating violence by members of the Ku Klux Klan–is protected under the First Amendment, unless the speech “is directed to inciting or producing imminent lawless action and is likely to incite or produce such action” (emphasis mine).

Today, despite the “crowded theater” quote’s legal irrelevance, advocates of censorship have not stopped trotting it out as thefinal word on the lawful limits of the First Amendment. As Rottman wrote, for this reason, it’s “worse than useless in defining the boundaries of constitutional speech. When used metaphorically, it can be deployed against any unpopular speech.” Worse, its advocates are tacitly endorsing one of the broadest censorship decisions ever brought down by the Court. It is quite simply, as Ken White calls it, “the most famous and pervasive lazy cheat in American dialogue about free speech.”