[andrewfong]

I'm not sure that's entirely accurate. Shouting fire in a crowded theatre isn't "inflammatory speech" as it's used in Brandenburg (although it may be inflammatory in another sense). So while the case referencing "fire in a crowded theatre" has itself been overturned, that's not the same as saying you can now literally shout fire in a crowded theatre. At the very least, you'd be liable for negligence.