These machines have gone through testing and modifications for several years. I went down to the FAA/TSA labs in Atlantic City in 2003 and saw these machines. I viewed full open settings and the filters in place now are significantly different and protect privacy as much as possible while still being effective. There have been many photos on different websites that have been proven to be photoshopped to give people the false sense of what is being seen. Like I have said before the image is basically a chalky blob (for me more blob than chalky).
The pat downs are now what they should have been from the beginning. You only get patted down to resolve an alarm so if you divest properly there shouldn't be much worry. The amount of people actually being patted down has actually decreased. Better technology and a more educated traveler have contributed to that.
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