According to today's Wall Street Journal gel-filled bras will no longer be allowed on airplanes. We do we go from here? Certainly lubricated condoms cannot be far behind (no pun intended); no doubt to be followed by breasts or penises containing liquid implants - though removing those prior to boarding might be a problem.
I suppose that one could conceivably have to remove one's blood as it might actually be a concoction of explosive and artificial hemoglobin. Hmmm... You could probably make a sub-critical mix of uranium or plutonium and artificial hemoglobin and transfuse enough into two children so that when they came into proximity to each other a critical mass would be created - so blood has to be out.
(Note: Yes the +Enlarge tag at the bottom of the image is really there.)
So to, probably with artificial bones, limbs metal plates - same problem.
But wait! Singling out the handicapped (or large breasted women or well-hung men) for special searches just because the prosthetic parts just might be considered profiling or discriminating.
So, soon everyone will have to line up next to the giant portable atom-smasher that bombards your body with "special" radiation to illuminate your insides - lest someone be lying about the nature of your underwear or your breast or penis implant.