Has everyone read the article before doing the normal Daily Mail thing of "Oh my god! The children! Outcry!"?
People can refuse to be scanned and the images can't be saved or printed off. I don't see an issue really! I'd just buy foil stickers saying "The legend is this way" with an arrow pointing down and watch the guy's face who is doing the scan
This is an interesting point you make about british society.
They immediatly jump on the social-worker/bleeding heart/privacy invasion bandwagon. Having been abroad for several weeks its refreshing to come back to such a closed ignorant and lazy society. I'm proud to pay so much in tax for so many folks to do nothing.
Anyway, regarding the OP.
This will dose people with ionising radiation, as with every other radiograph that is taken, exposing people to xrays must be justified by a medically qualified person signing off on each exposure. These exposures are dosed for specific body areas, and the dose tailors for effect.
This is complete full body irridation, as a low penetration value.
It is worth noting that exposing anyone to ionising radiation is like playing the lottery. It will cause cancer in some people some of the time. You can't determine a safe level as the cancer incidents are random events, so the figures tend to be given as a 1:10000 or 1:100000000 style likelyhood of causing death from exposure. Also it is impossible to prove an inonising event caused a death or a particular cancer, one can only correlate, thus why the figures are based on mass population exposures.
There are things you can do to decrease this chance, lower the dose, lower the amount of exposures, or exclude the exposures entirely.
Have the govt published the figures for this zapping process?
How many travellers per year are liekly to die as a result of the ionising radiation exposures?
I think if I was cabin crew in Manchester I'd request a trasnfer to a different airport for the duration of this study.