Before the days of Internet searches and Google maps, having an unlisted number really did largely protect you from snoops. Sure, if a person was persistent enough (read: creepy), they could follow you home from work, and learn where you lived. The Internet allows everyone to be slightly creepy, however, and no one is the wiser. Add Flickr, Facebook, Myspace, Twitter, Pownce, YouTube, etc -- and it's very difficult to remain anonymous anymore. It's almost like our lives themselves have become Open Source.