I'm not a Constitutional or 1A scholar, but I believe the test remains whether the speech is substantially likely to result in "imminent lawless action". Whether you wanted people to get trampled, or just thought it was a lulz thing to do, exigently emptying a crowded room on false pretenses is probably going to yield some pretty lawless behavior.
EDIT: Even so, that test was IIRC conceived as a means of measuring whether political speech — specifically, advocating the use of force or criminal behavior — was 1A-protected, so I really wonder whether this line of thought isn't moot.
Emulation isn't guaranteed to manifest the same edge case issues that surface these defects, though.
Then again, it's possible that emulation could surface other edge case issues. That's completely orthogonal to the value of non-emulated archaic architectures for this purpose, however.
EDIT: Even so, that test was IIRC conceived as a means of measuring whether political speech — specifically, advocating the use of force or criminal behavior — was 1A-protected, so I really wonder whether this line of thought isn't moot.