BTW, I think the existence of draconian regulations and restrictions (as one commenter put it) on photography in such places as malls and stores is all the more reason for photographers to be doing some good work there.
Here's Ulrich's comments on a bit of that (I've no idea if he has permission from any of the stores?): "With the Copia pictures, most people have no idea they've been photographed. I'm using a waist level viewfinder and am actually very close. They might notice me with the camera and ask about it. I try to say something simple along the lines of 'oh this is just a new camera, I'm trying to figure out how it works' or something along those lines. Again I'm not trying to deceive here, I just know that if I really try and get into a discussion on a larger idea, people will make assumptions on that idea. Kind of like when you tell someone an idea for a photo project and they shoot it down, well it's just an idea and the picture is going to be very different. I'd much rather have a discussion over the finished picture than a concept. I have 'found' some of the people in the pictures and they've all either cared very little, or thought it was really funny. The older couple with the motorized cart, I later found out, is a good friend of my Grandparents. I sent them and her each a print and they were going to blow it up and put it on their front lawn!"