> But the data collected is property of the government

I thought this was the get-out clause from the constitutional problems with Flock? That because Flock is a non-government organisation it isn't restricted by the constitution (i.e. the constitution only restricts what the government can do).

They can't have it both ways - if Flock are collecting the data then they are subject to the privacy laws. If it's the government collecting the data via Flock as just a service, then they are subject to constitutional restrictions.