KR, exactly right. Much of the so called "Security" requirements are more about putting on a show than securing anything. The whole security industry now is about making money and they will be lobbying the bureaucrats vigorously for ever more ways to inconvenience travellers, yet ignore glaring holes in their so called security matrix.
A glaring example is the cattle pens in front of the screening areas.
Around six every morning at Sydney a couple of A380 loads of punters nicely penned up in a bunch just waiting for a nutter to press the button.
If you want to see how to do security, take some lessons from the Israeli's.