I thought I was fairly clear in what I suggested you do. Simply refuse to proceed to the aircraft if you have to go through this. By the way they don't entirely trust you, that's one of the reasons there are two of you up front. The security is to prevent one of you from taking out the other then flying it into a building. If the company sacks you for refusing to be subjected to the degrading security check you will at the very least have the publicity of the unfair dismissal case and you can allow the courts to decide if the security check was pointless and degrading, I think you might lose.