There have been websites that track when people leave their house, because of Twitter and Facebook. Someone just made an App to make it easier to track.
That's just extremely... creepy. This will definitely be stalkers legit way to find and creep on someone to the max. .-.
Imagine those 12-15 tweens posting hundreds of pictures and information a day. Someone post the Pedo Bear picture
It's legal because it only searches public available information. edit: You realize that there is very little about you and your life that isn't a matter of public record right? Bank account numbers, medical records. That's about it for not public record and I am pretty sure the former can be found with limited use of know how.
Yeah there is not much info that is really private anymore. Some people just need to watch what they post on the internet.