With over 150 million users in the US alone, Facebook boasts a vast amount of personal data, which some users seem to be willing to give away, publicly.
Check out this website: http://www.weknowwhatyouredoing.com/
The website is powered by a tool that shows some of the public status updates users post on Facebook.
The point is, if you are a Facebook user, you should have you privacy control setting set to anything but “public” or you risk being featured in websites like the above.
To do that, go to https://www.facebook.com/settings/?tab=privacy and make sure your privacy control is set to anything but “public” and if it is set to “public”, change it to “Friends” or “Custom”.
Hope this helps.