I found those questions fairly amusing when filling out forms. In retrospect, though, I'm guessing that they expect people who meet those criteria to lie. They're there to give them a legally simple way to throw undesirable people out of the country (you perjured on your entry application), should it come up in retrospect.
Have you ever committed Genocide?
Are you coming to the United States to practice Polygamy?
Are you coming to the United States to use or deal in illegal Drugs?
Have you ever been a part of a Terrorist organization?
Are you planning to overthrow the US government?
US immigration policy brings everyone down except maybe those from the Ministry of Silly Walks.