Exposing yourself to regular doses of unnecessary x-rays is probably not a great idea. The human [ed.: backscatter] x-ray machines are mostly phased out already

Exposing yourself to regular doses of unnecessary x-rays is probably not a great idea. The human [ed.: backscatter] x-ray machines are mostly phased out already, though. Millimeter wave (the most common scanners now) is non-ionizing radiation and does not have any known association with an increased risk of cancer.