It's interesting to read that you have the same problems in the U.S.A as I have experienced in the U.K.. .I operated out of the same U.K. Airport for 7 years and was constantly amazed at the fact that engineers/cleaners & other ground staff were allowed to walk through a hangar door (sometimes carrying large tool boxes) and straight onto aircraft without ever walking through security or having there I.D.s checked. Of course the aircrew were always made to walk through security and although I never had a problem with this, at the end of the day Airport Security is only as good as it's weakest link!
If there are any airport managers reading this please do us all a favour - TAKE A LOOK AT WHAT REALLY HAPPENS AT YOUR AIRPORT AND DO SOMETHING ABOUT IT NOW.