A theater is a private sector, free speech does not apply there. Private entities and private spaces, however, are largely not required to protect your speech, and the first amendment does not protect what you say—only your right to speak. And the first amendment already has limits in this country:
To incite actions that would harm others (e.g., “[S]hout[ing] ‘fire’ in a crowded theater.”).
- Schenck v. United States, 249 U.S. 47 (1919).
- To make or distribute obscene materials.
- Roth v. United States, 354 U.S. 476 (1957).
- To burn draft cards as an anti-war protest.
- United States v. O’Brien, 391 U.S. 367 (1968).
- To permit students to print articles in a school newspaper over the objections of the school administration.
- Hazelwood School District v. Kuhlmeier, 484 U.S. 260 (1988).
- Of students to make an obscene speech at a school-sponsored event.
- Bethel School District #43 v. Fraser, 478 U.S. 675 (1986).
- Of students to advocate illegal drug use at a school-sponsored event.
- Morse v. Frederick, __ U.S. __ (2007).
Publishing a bomb making guide, or yelling in a theatre have nothing to do with what the first amendment is about.
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.