You have to empty your pockets, take belts off, and so forth[1], even with backscatter scanning (I just put all of my stuff in the boxes which go through the x-

You have to empty your pockets, take belts off, and so forth[1], even with backscatter scanning (I just put all of my stuff in the boxes which go through the x-ray machine), so that's not an advantage. It's also slower than metal detectors; with metal detectors, you walk right through and then go collect your stuff (unless it goes off), but with backscatter you go in, you stand still with your hands over your head for thirty seconds, and then you go out and wait until the agent there gets told that you're okay, at which point you get to go collect your stuff. Takes maybe a minute. No advantage there either. [1] Though watches seem to be fine, as I forgot to take mine off last time and didn't have any trouble. Might be different with larger watches, though.