After reading several posts in this forum about law enforcement officers attending to airport security checkpoint calls, usually when a passenger asks to see a supervisor or to file a complaint, I have the uncomfortable impression that LEOs are sometimes used as a tool to intimidate.

My question is if a law enforcement officer demands ID at an airport security checkpoint, and it is clear that I am not under arrest, may I refuse to provide ID? I understand some states have "stop and identify" laws (http://en.wikipedia.org/wiki/Stop_and_Identify_statutes), what about in those jurisdictions that do not?

I am not very familiar with American laws and practices on this matter, perhaps the more informed could educate, thanks.