So then you already have this country tabbed as a police state- they wouldn't be taking these down unless they already had some other, even more efficacious ways of tracking the citizenry and compiling dossiers on them.
Obviously, as I have said, you're fair game for any camera in public, but then you can video the cops as well. Flock isn't about simply "taking pictures," but about storing mass amounts of data about exactly who is going where and when.
But then only those doing something wrong need be concerned, right?