It's surprisingly easy to misunderstand the "problem" you are trying to solve.
Take this example (my emphasis added):
… searching airplane pilots [at checkpoints] regularly elicits howls of laughter among amateur security watchers. What they don't realize is that the issue is not whether we should trust pilots, airplane maintenance technicians or people with clearances. The issue is whether we should trust people who are dressed as pilots, wear airplane-maintenance-tech IDs or claim to have clearances.