It doesn't take a top-secret government spy agency with the latest surveillance gear to gather information about you. Every day, companies are gathering and sharing your data, even when you aren't logged in.
They are hot on your data trail. So are law enforcement agents, IRS investigators, and private attorneys, who can gain access to more information about your private life with a subpoena or a court order, which has a lower standard of proof than a search warrant.
Centre for Investigative Reporting