look the fiqh council in their infinite wisdom made some over arching statement, anyone can poke holes through it in a minute.
you cant put your trust in security personnel, sure and by the same token yo cant do the same with doctors and nurses, god knows what tupe pf pl go to med school, nursing school, orderly school.. other assorted ppl who see ppl in the hospital.
Personally, i would rather not have these things myself, civil liberties, health issues and all that jazz, but better arguments are needed than just going modesty modesty, because if tomorrow they say its a fully trained female agent looking at the images, then everyone would be all of a sudden okay with it?
in chicago where these things are getting launched, u can refuse it, but if u do u will be frisked and a handheld metal detector thingie would be passed over you.
UK may need to sort things out a bit. altough I do understand that passenger can request that the image viewer be of the same gender.