Your old Facebook posts might be exposing your phone number

Usually, if you get a text message or call from an unsaved number, you have two choices: 1. Hope that you can Google the number and figure out who it was that way, which almost never works. 2. Swallow your pride and admit you never saved the person's number, then think of a polite way to ask who they are. Jerk. But I recently found a third option when I got a text from an acquaintance whose number I'd never saved: searching Facebook. First, I got the text. It read, "It was so great catching up, ...