Back in the '60s, I guy I later worked for went to the US on business. In those days, you needed a visa, and one of the questions was on the lines of 'have you ever been involved in sabotage?' So he answered 'Yes' and was asked at a somewhat fraught interview what sabotage he had been involved in. The attitude changed when he explained that as a British Army captain in 1944, he was behind the lines in Yugoslavia liaising with the partisans and sabotaging bridges and railway lines!
The form was also supposed to have a question about ones intentions to overthrow the US government. It is said that the late Gilbert Harding put 'Sole purpose of visit' and they never noticed!