> even in the US you "cannot yet fire in a crowded theatre".

Actually, you can yell "fire" if there is a fire.

Note that the "can't yell fire" quote comes from a decision involving folks who were distributing pamphlets opposing the WWI draft. It was written by Holmes, who also wrote "three generations of idiots are enough" to justify a eugenics law, in a case that didn't involve any idiots.

Moreover, the "fire" decision was overturned by Brandenberg v Ohio.