Yes they are.
Body Scanners Used as Primary Screening Technology at Tulsa International Airport | Security Management
These scanners are designed to find things metal detectors miss, so why use them only if a metal detector goes off? I can supply plenty of more links if you insist on a further demonstration of your ignorance.
Maybe at Tulsa, but its not a TSA mandate. If it does become required that all screening is AIT, then there may be a problem. But currently its required by law
Direct from the article:
"TSA says the image generated only shows the contours of human private parts and also blurs the traveler's face for added privacy.
The body scanners do take longer than traditional metal detectors so as TSA expands the
pilot testing to airports in San Francisco, Miami, Las Vegas, Salt Lake City, and Albuquerque, it will watch closely to see if the body scanners lead to longer wait times or trigger other concerns from passengers."