Facebook, Twitter, Google, Apple, all copy your contact list from your phone often times without explicit permission. This is done for third-party “business purposes”. Should police be able to have a copy of all your contacts, too? What’s different about your physical location information? These are all types of mass surveillance technology with the cover of business as usual. Should police have access to mass surveillance technology? What about the information the technology generates? The fourth amendment is clear. Get a warrant.