This brings up some very disturbing thoughts that I don't know if the TSA has addressed. While the cat is screened to make sure she does NOT have that glock under her collar, how do we know her real intent? She could be a trained killer just waiting to pounce.
My scenerio is probably more suited to dogs, and the larger breeds that would be service animals without carriers. How do we know that German Shepherd seeing eye dog is really not a trained killer just waiting for a pilot to open the flight deck door, jump over the barricade cart, rip his throat open, take out the pilot flying and then crash the plane? TSA better look at retraining BDOs in pet behavior too - I don't care how many billions of dollars it takes!
(I think I'm being sarcastic, but I'm not sure any more).