DuncanF
As soon as you have people allowed airside without a search then you also have people who could be coerced (someone could kidnap your family) into carrying naughty things through to hand to the bad guys.
OK, so why don't we take it one step further. Why are airport police allowed to 'roam' land/airside without going through the same procedure? They can carry firearms airside! It comes down to trust. At some point you HAVE to trust the various background checks etc that have been done. Who is to say that said policeman would not have his family kidnapped and the same threats made as to you allude to above?
Sorry for pointing out the bleeding obvious.
PP