Actually we have free speech in the USA however in my journalism classes we discussed that during the Vietnam war a grandmother wrote to her grandson and told him not to go. Supposedly she was arrested. But for ANDY636
"The idea of falsely shouting "fire" in a crowded theater arose from the Supreme Court's 1919 decision in the case Schenck v. United States. The Court ruled unanimously that the First Amendment, though it protects freedom of expression, does not protect dangerous speech."