If it can conceivably be considered a “third party record,” the government is going to seek warrantless access to it. The Third Party Doctrine — ushered into existence by the Supreme Court in 1979 — says there’s no expectation of privacy in information shared with third parties. That case dealt with phone records. People may prefer the government stay out of their personal conversations, but the Smith v. Maryland ruling said that if people shared this info with phone companies (an involuntary “sharing” since this information was needed to connect calls and bill phone users), the government could obtain this information without a warrant.

More Mass Surveillance: FOIA Docs Reveal Illegal Snooping On US Residents’ Financial Transactions