Well then they will probably pat you down! I used to be a TSO and I can tell you, we look for any excuse to pat people down. Sarcastic remarks are on the top of the list! (you should still say it though!)

As for looking for reactions, yes I am sure that is what they are intending to do, however I sincerely doubt their ability to accurately assess real trouble situations. I believe it will just evolve into another form of TSA harassment. It's clearly just another way to spend money and generate this "We are saving America" image they think they are projecting.