My point, I think, exactly. Once the baggage is in the "posession" of the airline they can then inspect and do whatever deemed neccessary. I am guessing that a lot of inspections can be made in a non-invasive manner. I.E. not opening the bag.
And, I keep thinking of cutting down on the MASSIVE amounts of luggage that some people insist on carrying on. Agreeably some "stuff" is neccessary but when I fly in the US I do often see people carrying enough stuff that inhibits their passage through the Jet Ramp.
There has got to be a better way?