David, I think you'll appreciate a story a friend told me this past weekend.
He recently had occasion to fly from BWI to Portland, ME. In the security line ahead of him was a gray-haired woman with just about everything possible that you aren't allowed to carry on in her carry-on bag. She was giving the screener lip about having to get rid of her enormous can of Aqua-Net, etc., until the screener, evidently fed up, said very loudly, "Bernie! I need Bernie!"
Bernie, it turned out, was about 6-6 and built like a linebacker. He very quietly said to the cantankerous passenger, "Is there a problem here?" The woman looked up at him, very meekly said, "No, sir," and that was the end of the can of Aqua-Net, etc.