had a day a few weeks back when I was asked to move on twice in one day - and then a week later again...
first one was looking through a new lens on my RZ at the engineering school at uni, security guard asked what I was doing - "well i;m looking through my camera" I replied - apparently they have had complaints about "people taking photos" - I told him he should instead head down to the photography dept at fine arts, and he'd have a field day ... not received well at all, he asked for my student ID (without giving it he would have escorted me out pronto) and then radioed back to his station or whatever and mentioned i had a 'spy type' camera (an RZ!) - this had all taken so long i had to leave anyway...
couple of hours later same thing happened down in town - too boring to talk about - blue suited little parasite bureaucrats with their belts'n'radios and badges ugh! - the false sense of security that these guys perpetuate only increases the irrational fear in the first place... (speaking from New Zealand, that is)
anyways, great thing with the RZ (and others) is that you can shoot from the hip and still get an ok glance at the viewfinder, and also a good trick for removable backs is to pull them off with the dark slide in, and point to the steel slide itself and say "don't worry, theres no film in it anyway"
>> grin <<