I thought the legal system already addressed this sort of thing? Maybe in the US the idea of "free speech" trumps everything else? But aren't there all sorts of laws about "incitement" or "conspiracy"? Seems like a genuine dilemma over where "free speech" begins and ends.
E.g. promoting COVID conspiracy theories. if the place is on fire are you allowed to tell everyone it's all fake and they should stay put? Can you shout "theatre" in a crowded fire?