Whenever I enter the US, I need to fill out a little green form. The front page asks all sorts of reasonable questions: Name, passport number, date of birth, address I plan to be in the US etc.
The backside, however, asks questions such as whether I was involved in the crimes of Nazi Germany between '33 and '45, or whether I have ever been involved in crimes against humanity such as genocide etc:
This always gives me a chuckle and I ask myself: Even if I HAD been involved in genocide, why would I tick "yes" on that box?
Yet, somewhere in the government someone must think that this is an important thing to ask, and about this is what I am skeptical about. Is there any case in history that someone ticked yes on one of these forms and got caught that way? What is the purpose of these questions anyway?