for the same reason you can't yell "fire" in a theater.
You absolutely CAN yell "fire" in a crowded theater, and it's not illegal to do so. You can however also be SUED by anyone who is injured in the resulting chaos.
The "fire in a crowded theater" line is one of the biggest and oldest myths/misconceptions pushed by opponents of free speech. Simply because you are not protected from the consequences of your speech does not mean that the speech itself is unlawful. Note also that it requires there be no actual fire, and your speech therefor be demonstrably false.
You absolutely CAN yell "fire" in a crowded theater, and it's not illegal to do so. You can however also be SUED by anyone who is injured in the resulting chaos.
The "fire in a crowded theater" line is one of the biggest and oldest myths/misconceptions pushed by opponents of free speech. Simply because you are not protected from the consequences of your speech does not mean that the speech itself is unlawful. Note also that it requires there be no actual fire, and your speech therefor be demonstrably false.
It's amazing how much their ideology falls apart once you apply "effects on other people"