It was first used against a man in 1917 for giving an anti-war speech in Canton, Ohio. It was later popularized to charge people handing out anti-war flyers opposing the WWI draft with sedition.
It was later overturned in 1969, in which the Supreme Court held that "the constitutional guarantees of free speech and free press do not permit a State to forbid or proscribe advocacy of the use of force or of law violation except where such advocacy is directed to inciting or producing imminent lawless action and is likely to incite or produce such action."
The fact that people still cite this analogy to argue for the abridgment of free speech 100 years later is truly disturbing.
