Ditto. Flying out of SFO (where they have MMW machines, at least in the terminals I use), there's another person opting out about half the time. If I get a ch

Ditto. Flying out of SFO (where they have MMW machines, at least in the terminals I use), there's another person opting out about half the time. If I get a chance, I'll ask them why. It's almost always a matter of principle, as it is with me.