If you want to travel I would be very careful about confronting "any" airport staff regarding their interpretations of security rules or when they should be applied. A couple of years ago after an argument at the carry on baggage X-Ray station (due to extremely heavy handed and rough handling of my bag) I litterly had to back off and apologise as the scrote responsible called over his buddies who ganged up on us in a disgraceful manner, had everything out of our carry on bags, full body frisk, belts and shoes off etc, all very intimidating and clearly designed as a "show of force" to show just who is in charge. "Liverpool John Lennon"