PatrickLondon:
I seem to remember Peter Ustinov claiming that to the question (on the form the US authorities asked new arrivals to fill in) along the lines “Do you intend to engage in activities intended to subvert the US constitution?”, or something equally idiotic, he answered “Sole purpose of visit” and was still let in. But that was in the early 60s.
Customs officer: “Do you have anything to declare?”
There’s the old joke about the little old immigrant lady taking her citizenship test, who got confused by the question, “Do you advocate the overthrow of the United States government by subversion or violence?”
After being puzzled for a moment she said, “If I have to choose, I choose violence.”
Customs officer: “Do you have any weapons, illegal drugs, flammable substances or explosives?”
Little_Nemo:
Is it a violation of American law for somebody in America to call for a forcible revolution in another country? If I (an American) was calling for people to assassinate Queen Elizabeth II and blow up Parliament, would that be illegal? Suppose I was calling for the people of North Korea to rise up, kill Kim Jong-un, and violently overthrow their government?
You could be in trouble - see subsections (b) and (d) here: 18 U.S. Code § 112 - Protection of foreign officials, official guests, and internationally protected persons | U.S. Code | US Law | LII / Legal Information Institute