The real problem that isn't being addressed by turning body scan images into funhouse images is that if one is using active scanning that involves either X-rays or THz radio frequencies is that it is effectively a form of assault (leaving completely aside any "illegal search" arguments).
X-rays break chemical bonds. Breaking bonds in water (much of the human body) creates hydroxyl radicals which attack DNA. Some of these attacks explicitly create or contribute to the creation of DNA double strand breaks. Repair of DNA double strand breaks corrupts the genome . THz wave have recently been found to create DNA "bubbles" which will contribute to the formation of DNA double strand breaks .
So there is no way that these "active" searches can be done without causing damage to the individual being "searched". The only "searches" likely to be non- or minimally-hazardous are metal detectors which use magnetism or chemical sniffers which would detect the presence of hazardous materials. One might also be able to develop a non-hazardous scan based on NMR technology but I don't think we are going to see such scanners soon at airports.
1. The WRN and DCLRE1C (Artemis) genes are key actors in DSB repair and have exonuclease activity. They will chew up DNA bases in order to create strand ends which can be effectively be ligated (sewn together). This in turn produces indels (insertions & deletions) which have played a role in evolution (as seen by the hundreds of thousands of indels being found in individual human genomes) as well as in individuals where they contribute to the formation of cancer  and/or aging .
2. Bubbles (strand separation) in DNA increases the distance between single-strand breaks on opposite strands which allows the DNA to "melt" effectively producing a DNA double strand break.
3. Studies of cancer genomes have found that indels may be involved in 15-25% of cancers which have currently been sequenced.
4. Misrepaired double strand breaks accumulate over time and gradually corrupt the genome -- so if they don't occur in cancer genes they end up producing a dysfunctional genome and a generally accelerating decline in cell function.