Re: terrorists
It was Gilbert Harding.
Wilde lost at US customs - he said he had nothing to declare but his genius, and the customs official said they had so much of that in the US that there was no need to tax its import.
It was Harding who wrote, next to the question about intending to overthrow the government of the United States "Sole purpose of visit".
In an unrelated incident, Alan Turing joined the Home Guard to learn how to use a rifle. When he had, he announced his intention of leaving and was told he could not because on the application form he had ticked a box agreeing that he was now bound by military discipline. To which he replied that he had noted the box and not ticked it.