How hard can it be?
Just play the game gentlemen.
There are crazier things going on in aviation than just walking through a metal detector.
If a pax uses his mobile phone on board, we pilots are all ready to crucify him.
Why? No one knows for sure. But we sure like to give'm hell for not following the rules. (Apparently we are as much as a jobsworth as a 'lower paid' baggage screener!!)