By this logic, 'The argument isn't "Instagram is publishing people's locations," it's "People are allowing lots of services, Instagram among them, to publish their location, and it's harder to participate in modern society while reliably opting out of all of them."'

shouldn't only people who would opt-out of a phonebook listing be concerned? I would definitely not be in that group, but am concerned with the modern situation. I see the automated and large scale compilation and cross-referencing of these data as the dangerous part.