I work in a pharmacy, so I do think about these kind of situations from time to time ( I mostly worry about or female techs getting robbed while leaving work after dark). Honestly, if some crack head comes in with a gun and demands some oxi's not only would I point him to them, I'd probably help him bag it up and take it to the car
Hell they're just drugs, if they want 'em that bad they can have 'em. wheres the logic in losing your life over some pills?