That Wikipedia page you linked seems more pointed to social issues (segregation, abortion, etc). It certainly doesn't apply in the cut and dry manner that you suggest; anyone who thinks that making it illegal to cause public panic is a good idea loses all credibility.
Causing public panic by, for example, writing pamphlets against the draft.It certainly doesn't apply in the cut and dry manner that you suggest; anyone who suggests that making it illegal to cause public panic is a good idea loses all credibility.
...causing public panic by yelling 'fire' in a theater or 'bomb' in an airport. Look, if everyone thought the same way as I did, I would say chuck the Constitution out and let's apply common sense! But they don't, and we can't. So sometimes we need laws about things like what you can say in a public place. This is a pity, but it is what it has to be. And yes, I agree by and large with the clear and present danger test. Do I like it every time? No. Do I acknowledge it has to exist? Yes.