Your Personal Data, For Four Cents
This, which is basically the opposite of this should scare you. I can buy your data, for a measly four cents. I can find out where you live, what you signed up for, where you signed up, your gender, marital status, address, name, email, D.O.B., income, homeownership, and telephone number. You should be scared. And mad. (Via Greg Yardley)