You know, there is security, and then there is paranoia, and insanity.
Homeland Security officials have warned airport authorities that al-Qaida and other extremist groups might seek to steal uniforms and ID cards from airline and airport workers as part of hijacking attempts.
If I were an employee with an airline, I would...
1. Actually Wear My badge instead of placing it on the counter next to me.
(witnessed that once)
2. Report my badge as STOLEN/MISSING as soon as I noticed (which would be immediate considering I would always be wearing it.
3. Be a stupid dumbass for not noticing that someone took my badge and uniform off of me.
Why not just do away with the damn badges and use voice encryption like in Mission Impossible. Show up for work, Place your thumb on a pad and say your name. It will then automatically check your authenticity. This would be required anytime you would be accessing sterile areas.