The security line is such a mess with dealing with laptops, shoes, belts and emptying your pockets that it is so easy to misplace something like your ID being that you have to have it out when they check your boarding pass. One time they pulled me over for the dreaded random pat down and I can see my wallet sitting their in one of those containers just ripe for the stealing. I get back and see a set of keys with an RSA token just sitting there. I hand it to the TSA agent and started looking for the woman in front of me in line. Fortunately she stood out because she was wearing a fairly distinctive hat (and she was cute)
I found her and she said no they weren't hers and she had noticed them as well. I feel bad for whomever lost those. Could you imagine flying home and you get to the parking garage and realize your lost your keys?
But really....if you prepare knowing what you're going thru, and it's easy to know what to expect, it's not that big of a deal. Inevitably, I put everything that will cause an issue in my carryon. My belt is off, my phone is in the carryon and shut off, any other electronic gizmos and keys are also in my carryon, my shoes are untied and easy to slip on/off. Essentially, when I get to the security desk, I go thru with my boarding pass and ID in my pocket and nothing else. I fly thru, and inevitably mrs00 has forgot about her 3 tubes of liquid lipstick and her bottle of water, and all the other **** in her purse, and she has her phone in her pocket, and she gets held up.