My moral turpitude?

I'm filling in a form that's required to enter the United States. These are the kinds of questions they ask (and presumably, it's stuff they can use to deny you entry).

Do you have a communicable disease; physical or mental disorder; or are you a drug abuser or addict?

Have you ever been arrested or convicted for an offense or crime involving moral turpitude?

I had to look that up. Apparently turpitude = inherent baseness. Hmmmm.

Are you seeking entry to engage in criminal or immoral activities?

If I'm trying to get into the US to commit crimes, do you really think I'm going to tell you so? Also, immoral activities--how am I supposed to know what you consider immoral? Maybe I'm going to write explicit pornography while I'm there. What do you think of that, Department of Homeland Security?

I wonder if anyone ever answers yes to this question.