However, many fliers claim TSA deactivated backscatter body scanners to keep lines moving without scanning and also without enhanced pat downs.
According to tweeting travelers, many backscatter and millimeter-wave AIT scanning machines at airports are not in use at all, making opting-out impossible.
Some flier comments from the link below:
Backscatter machines aren't being used at LAX. They are all roped off.
Didn't have to opt-out, not using backscatter machines for some reason.
Didn't get 'scattered; normal X-ray. In fact in the 15 min it took for us to clear NO ONE was selected for backscatter in 2 lines.
No groping no irradiation (backscatter present but not in use).
Backscatter machines all roped off at SJC.