"Marc Rotenberg of the Electronic Privacy Information Center is suing the Transportation Security Administration (TSA) to remove body scanners from ariports. He says TSA does not have the authority to place these scanners in airports.
There are health concerns due to the radiation, privacy concerns because the scanners are a full body x-ray, and religious concerns. The TSA telling Americans not to be concerned about the radiations and they have been downplaying concerns without providing scientific evidence of safety.
These scanners are not even the right technology to deal with the powder explosives that have been used in past threats, so there really is no safety improvement either."