This guy was PLAYING Big Brother and using computers which did not BELONG to him.
Yeah, and all those people wandering around Apple stores STEALING processor cycles should all get the same treatment! /sarcasm
Those machines are obviously there for people to play with, and as far as I know there is nothing saying what they can and can't be used for. Using the webcam to capture images is not necessarily any less legitimate than using the web browser to browse web sites.
People are bizarrely schizophrenic about being photographed. His program is basicly the same as CCTV. CCTV has been around for ages, recording everone day after day. I'd bet there are even a few CCTV cameras in the Apple stores in question. Nobody cares. It's just easier to ignore it. But when you see your own face staring back at you from some computer screen somewhere, everything changes.
People are totally in denial about the death of privacy, and they're just itching to shoot the messenger, because there's nothing else that can be done about it at this point.