[MACVSOG68]

There is no law stating that you can't yell fire in a crowded theater. As you stateed laws can be enacted to ensure that that right does not endanger or infringe of the rights of others; that does not mean that they can ban certain words from being spoken or to require expensive "licenses" to use such words.

No, the law would state that no actions can be taken including the use of language to endanger others. That would cover your crowded theater scenario. And yes, licenses are required for all sorts of activities exercised under the guise of the 1st Amendment, including licenses to print and sell books, licenses for journalists, licenses for broadcasting. All libel and slander laws are designed to curb the use of speech, whether written or verbal.

[looscnnn]

Ok let me break this down:

licenses to print and sell books

You can print and sell your own books on ebay or in a yard sale without a license.

licenses for broadcasting

licensing of channels of the "public" airways

licenses for journalists

never heard of that in America.

[El Gato]

ncluding licenses to print and sell books, licenses for journalists, licenses for broadcasting.

There are no licenses for printers, booksellers, nor even journalists. Other than general business licenses which apply regardless of the nature of the business. You can't even selectively tax them. (A tax specifically on newsprint and printers ink was thrown out on the basis of Freedom of the press) Broadcast licenses are for use of the public airways, if you broadcast just on cable, no such license is required.