330M people in the country, you can run that entirely though a remote FBI office.
and the people using the data are gonna be the local cops; FBI ain't flying out to chase a couple of basic-ass assault charges or thefts.
email snooping, hand full of highway cameras at known bottlenecks, border crossings -- these are abstractions to most people. the flock cameras in their neighborhood are not, and cannot be absractions.