To get terrorists to be more creative, you have to convince them that the TSA would notice so it's not worth trying to walk through security with a kalashnikov

To get terrorists to be more creative, you have to convince them that the TSA would notice so it's not worth trying to walk through security with a kalashnikov in your hand luggage. However, I accept your point that given the cost and inconvenience, it would be great if the TSA actually did notice.