Hi
You'd probably get bumped from the flight and arrested. The check-in staff don't want to hear stupid remarks like that, joke or otherwise
Smudgesmum
Total and utter bolleaux !!. Please don't bother to reply if you don't know the answer.
Saying NO is NOT a stupid remark. It is the honest answer to the question, if it is the case (excuse the pun) you didn't not pack your bags. The check-in staff want to hear the HONEST answer.
As BHX86 said, you would just be sent for extra security screening, thats all. No big deal.
The reason the questions are in place, are not just for what is asked, as most people will always answer YES, it is the fact that if you do give a dishonest answer and something untoward is then discoverd, then you have broken the law in providing that dishonest answer and can be arrested for it.