Your definition of privacy expectation isn't accurate. For example, you have absolutely no expectation of privacy in what meal you ordered at a restaurant. >Is

Your definition of privacy expectation isn't accurate. For example, you have absolutely no expectation of privacy in what meal you ordered at a restaurant. >Isn't this similar to the problems that people have with being tracked in retail stores? You can be tracked in a retail store too. >And for that matter what is the legal difference between the police collecting certain data and, say, a business person collecting that data? And perhaps selling it to the police? (Question not a statement). Anything you willfully disclose to a third party is no longer private, with very few exceptions like medical records.