I'm a little puzzled as to how this system gets co-ordinated.
Presumably the subject goes through the scanner, a remote operator spots something dodgy and...then what? Do they have to contact a security person on the spot and say "Have a look at that guy with the, er, trousers."? They can't identify by colour or clothing, after all. In fact, if the subject is a chap in a burkha, the security people may be puzzled by the 'guy' identifier to begin with.
Does this mean that each subject must wait until there's some kind of 'OK' signal? How much would that delay the process?