Having friends and family know where you are is one thing, but quite another if it is someone you don't know or don't want to know. Hopefully this is good information for you to know what is out there. Since teens aren't using Twitter as much as adults, so this may not be anything to worry about for your family. But as the Internet evolves, new functionality like this gets shared over many sites.
What do you think about this feature? Could it help your family keep track of where everyone is?