The US Supreme Court has already shown its reluctance to allow wide-spread, but otherwise legal, data gathering. In US v Jones, a GPS tracking case, the minori

The US Supreme Court has already shown its reluctance to allow wide-spread, but otherwise legal, data gathering. In US v Jones, a GPS tracking case, the minority opinions were basically concerned with the fact that the GPS monitoring continued over a wide period of time, covering a wide area: In his concurring opinion, Justice Samuel Alito wrote with respect to privacy: "short-term monitoring of a person's movements on public streets accords with expectations of privacy" but "the use of longer term GPS monitoring in investigations of most offenses impinges on expectations of privacy" https://en.wikipedia.org/wiki/United_States_v._Jones_(2012) https://en.wikipedia.org/wiki/United_States_v._Jones_(2012)