If it's technology, I want to know about it.
Have you checked your Facebook PhoneBook yet?
Facebook has shamefully added all of our friends phone numbers for everyone to see. Was this a mistake or the evolution of facebook? See it for yourself, go to the top right of your screen, click “Account” the “Edit Friends”. On the upper left side of your screen is the “Phone Book”. Everyone’s phone numbers are now being published. You need to manually change your privacy settings to fix this problem.
Unless Facebook changes their ways, you better get very familiar with the user interface on the facebook privacy page.