You probably already know that you have precious little privacy, and that shadowy data brokers have built the buying and selling of people's personal information into a multibillion-dollar industry.
But did you know this: Nobody knows how many so-called list owners and list brokers are operating nationwide. The best guess is tens of thousands.
Or this: These businesses operate largely unregulated, overseen day-to-day by no official authority.
And if they get things wrong — that is, if there's ever need to correct files as a result of a death, divorce or similarly life-changing event — there's pretty much nothing you can do to hold firms accountable.
Privacy was in the news recently as the Federal Communications Commission approved sweeping rules aimed at ensuring that broadband providers don't abuse customers' browsing history, mobile location data and other sensitive info. Service providers must get customers' permission before using or sharing such information.
The FTC has also proposed legislation that would address some of the problems. But it has gotten nowhere.
Meanwhile, the number of data brokers continues to grow, with each firm exploiting the convergence of public records and digital technology.
"Consumers don't realize how much information they give out," said Suzanne Doyle-Ingram, president of the list broker Strategic List Services. "It starts with your phone service. As soon as you sign up, that information becomes available."