Why are you guys so naive. Just because you show an ID everyone should assume that it is valid?? You seem to assume that every screener can tell the difference between a valid ID and uniform and a fake one.. get real. Unless you are going via a secure channel you should be subject to the same checks as everyone else. I find it a pain being checked each time I go through security over here ( which has been stricter than the US for many years ) but accept the reasons for it.
Assumption and complacency are a terrorists best friend.