“A third-party firm leaking customer location information data [from all U.S. mobile telephone service providers in real-time] poses serious privacy and security risks for virtually all U.S. mobile customers (and perhaps beyond, although all my willing subjects were inside the United States).”
Brian Krebs, “Tracking Firm LocationSmart Leaked Location Data for Customers of All Major U.S. Mobile Carriers in Real Time Via Its Web Site.” KrebsonSecurity.com. May 17, 2017.
What could possibly go wrong?