Airport security: What is your Name?
Traveller : Batman
Airport security: Your Real Name; Please?
Traveler : Batman
Airport security : Please don't try to be funny. What is you name?
Traveler : Batman
Airport security : OK. What is your Family Name?
Traveler : Superman
Airport security: So you are really trying to be funny. I would have to take you to detention room for further questioning.
Until they saw the passport.