I see two threads of discussion appearing now and then, which never seem to find one another.
The first one is "Man, people sure are becoming bitches about taking a few pictures" which, to be honest, has always been with us. Some people simply find the process uncomfortable for one or more of several reasons, and some people always have. Anyways, the self-styled "street" photographers always seem to have a whole bizarro philosophy that boils down to "be sneaky, but not in a sneaky way."
The second one is "OMG, digital technology makes privacy go away!" which is genuinely a new and increasing problem.
Let's smash these two things together and see what happens.
Maybe people are increasingly becoming bitches about being photographed, because they know on some level that with a photo you can (or soon will be able to) find their name, home address, and for a modest albeit illegally rendered fee, god damn near anything else you want to know about them. It does rock one back a little bit, eh?
While you may not be stealing my soul with your magic picture box, it certainly could be step one of stealing all of my stuff.
Now, in reality, does it matter? Probably not. Your picture can be taken without your consent or knowledge. It is taken constantly. Simply denying some clumsy dork with a big black camera isn't an act with any real substance. Still, simply because the gates have crumbled under the mass of barbarians, one still feels something a little off about opening the side door to let a couple more in.