[hackuser]

Notice that the very many organizations that track people, from businesses to government, rarely notify those they track (in an effective manner) and sometimes go to great lengths to hide it (e.g., many stories report police departments hiding their surveillance tactics, such as with Stingray).

If the argument is that it's good for the people tracked, why hide it?

(EDIT: Deleted the first paragraph; I can't find the reference.)