I don't recall anyone gagging me when I've entered theaters. Nor are there any prior restraint mechanisms that would prevent me from committing libel. Were I to commit libel or cause a civil disturbance, I could be punished for such action after the fact, but I may not be gagged for fear of crimes that I might commit.
Understood and as usual you make good points.
However, libel and slander rarely result in death.