most of the full body scanners on the market are based on
terahertz waves (T-Rays), well there is evidence that T-Rays kind of shred DNA.
I don't give a fuck about political correctness, racial profiling is fine with me. Seriously target and search the people most likely to do something leave everyone else to more reasonable levels of inconvenience.
http://www.technologyreview.com/blog/arxiv/24331/
We consider the influence of a terahertz field on the breathing dynamics of double-stranded DNA. We model the spontaneous formation of spatially localized openings of a damped and driven DNA chain, and find that linear instabilities lead to dynamic dimerization, while true local strand separations require a threshold amplitude mechanism. Based on our results we argue that a specific terahertz radiation exposure may significantly affect the natural dynamics of DNA, and thereby influence intricate molecular processes involved in gene expression and DNA replication.
personally I like my DNA to replicate the natural way with as little influence from sources of radiation as possible.