They have the (eminently sensible) policy that all bags must be checked. Hokay, here you go, it's heavy.
I walk around a bit, check it out, go to leave. I set of the sensors at the door.
"Sir, we need to check your bag."
"Hokay" (I didn't steal anything, no big deal, she's doing her job, and politely too.)
I go in and start opening pockets, manager and girl stare in horror. For my bag is a complete network support rig. Laptop, power supply, battery, power cable for iPot, network cables, firewire cables a Newton 2000, usb cables, adaptors, and on and on..and that's just the main pocket.
it would take them hours to really search it. They decide that I should walk through sans bag, because the bag has enough electronics to reprogram their alarm system.
no beep, all is good. They apologize, I tell them to think nothing of it, and go on my merry way.
But the look of horror on their faces when they realized that I had wwwwaaaaaaaay to much electronics...priceless.