My assumption is that the camera is not loaded -- and that the person handing me the camera would expect me to fiddle with it -- put it up to my eye; play with the focus; wind and fire. (I don't go opening the back, though -- that holds no interest.) If they didn't want me to fiddle with it, they shouldn't be handing it to me in the first place. I realize that's pretty obnoxious of me, and I'm generally more considerate than that, but with cameras my curiosity gets the better of me.