I can attest to that... years ago while sitting around getting all of my belongings searched by guard because I didn't have a permament ID, I watched a man walk out with a handtruck stacked with Cisco gear and 4-5 laptops. Nobody challenged him because it had an ID card on his belt. He put the stuff in a Neon parked at the curb, left the handtruck on the sidewalk and drove away.

I guess it took two weeks for anyone to notice that the stuff was gone...