I think the larger issue here, that legislation is not caught up with the digital world. And I don't suspect it will for some time. There is little incentive for companies and governmental agencies from restrictions on what they can or cannot track without a warrant. Law enforcement agencies want easy access to your entire digital footprint and companies want to continue to pilfer that information for profit. Unless sweeping legislation is introduced or broad enough case is brought before the Supreme Court your digital life will remain an open book to anyone with enough money, technology or know-how.