"There shouldn’t be an expectation of privacy in public spaces." Perhaps not to some degree, but facial recognition takes it up a notch. And ultimately what we should or shouldn't expect is up to us right?

Suppose someone found a way to passively and remotely read people's minds. And as a result you can't go anywhere in public unless you were OK with your thoughts being captured and recorded. You could see how that would suck right? And the potential for abuse? Might be great for the police I suppose, and would probably lower the crime rate. But would you want to live like that? Facial recognition isn't that extreme of course, but they are both in the privacy ball park, at least in my opinion. So maybe its just a matter of degree...like what you're willing to put up with / feel comfortable with.