> The SC's holding was that the government's acquisition of location data from a third party was itself a fourth amendment search because the individual has a reasonable expectation of privacy wrt location data.

Specifically, the GPS coordinates logged by their cellphones.

> So you're kind of agreeing with me here: the data is either private and subject to a warrant, or it is in public where individuals do have a reasonable expectation of privacy wrt aggregated location information.

You're missing the point: Flock camera's don't record where people have a reasonable expectation of privacy.

> And again, a person standing on a street corner is constitutionally distinct from LE following and tracking individuals movement over time.

Wrong: as long as law enforcement are only tracking your movements in public, they don't need a warrant or probable cause.