I have had contact with LEO's in the airport about 4 times. In each instance they were called, at my request, because I disagreed with a TSA employee (most recent) or an airport employee. In every instance it has worked to my benefit. Why? Because even if I was being stubborn, a "real" LEO quickly figures out who is right, and who is wrong, and who is wasting their time. I am ariticulate and logical and, notwithstanding popular opinion to the contrary, most LEO's appreciate someone who is articulate and logical, even if the individual is being a stubborn butthead at the moment.