Another example of reactionary practices designed to falsely re-assure the general public...rather than spending resources averting danger on our flights.

The IRONIC thing:...either someone is hiding metal or they are hiding something non-metal.

If they are hiding Metal:
THEN THE DETECTOR WOULD GO OFF! (So no need to remove shoes)

If you are hiding NON-Metal (plastic explosives?):
THEN THE TERRORIST WOULD STICK IT IN HIS JOCK STRAP AND WALK THROUGH LIKE NORMAL! (So no point in removing shoes)