Is this really that different from police asking for security camera footage from a convenience store after a robbery? Yes. Because it's much more like aski

Is this really that different from police asking for security camera footage from a convenience store after a robbery? Yes. Because it's much more like asking for the footage from every camera in (large) area for "guys wearing baseball caps." The distinction is that the reach of the search has been expanded from an individual suspected of harboring the data (or in your example, from a single convenience store) to a much larger class of individuals. Or in other words, from a targeted subpoena to a full-scale dragnet.