I've traveled quite a bit and have been subjected to many airline security measures. I understand that the ways of the world is why we now have to walk through a metal detector, send our purses, murses and laptops through an x-ray machine and yes, now be sniffed by a dog.
The TSA has announced that they will begin to remove all body image scanners or aka "backscatter" machines by June. Unfortunately, they were still in operation at the Memphis airport yesterday when I flew back to Minnesota. I can tell you from personal experience that this is an incredibly idiotic security system. I'll get to that later.