You're quite right of course.
But, since 9/11, if not before, BAA staff would seem to view themselves as the constitutionally appointed interferons of the airborne travelling public.
Since most of them would appear to be of such limited intelligence as to have misread the instructional preamble for the entrance examination for non - commissioned officers, for such is, at the least, the role in which they must view themselves; then what on earth can one expect from those besides whose professional expertise Securicor guards would appear gifted?