Re: airport security
I once had a similar discussion with security because as carry-on I had a carrier bag containing a disassembled model plane with a 0.8cc motor on it. They thought the motor[*] was a gun. Never mind that the motor was only 60mm long and 50mm from top of cylinder to bottom of crank case, it was obviously a goddam handgun despite its ungunlike shape - or that wingtips and tail were sticking out of the bag.
* Cox TeeDee 051 on the front of a 1/2A competition model for those who know about models
Biting the hand that feeds IT
