1. If they aren't wearing clothes, they can't hide explosives.
2. They have not experienced security methods like this before. 
3. The capture of an air passenger who was trying to detonate explosives hidden in his shoes. It led to passengers having to remove their shoes before getting on planes.
4. Because security procedures become more strict with each new threat, such as the shoe bomb incident.
5. The airlines are desperate to assuage passengers' fears that it is dangerous to fly.
6. Hey - - this is a cartoon!
7. No, the expressions on the passengers' faces indicate they may have limits. 


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