The premise of the "shouting fire in a crowded theater" example is obviously not predicated on the illegality of shouting "fire" in and of itself.

> Ultimately, whether it is legal in the United States to falsely shout "fire" in a theater depends on the circumstances in which it is done and the consequences of doing it.

Edit: I am not agreeing with the parent that there is value in the comparison, only that the premise of the example is valid - i.e. that speech can have consequences dire enough to make it worth controlling that speech in certain contexts.