AT&T Introduces Particularly Creepy FamilyMap Snooping ServiceAT&T now offers a $10/month plan that gets you the realtime location of two of your plan's phones ($15/month for five). But unlike other family trackers, this one doesn't appear to need parental permission/notification.
One of our editors tried it out, and was able to track members of his family without them knowing—and without his knowing the master password to the AT&T account. You just create a separate login for the service.
When
http://www.boygeniusreport.com/2009/04/14/att-launches-familymap-service-lets-you-spy-on-anyone-anywhere/">Boy Genius tried it, they tracked phones totally silently, that is, without the phones receiving any indication of being observed. Also, BGR mentioned that the service was able to access GPS position data on phones that had GPS—it wasn't just triangulating the phones using cell towers.
http://i.gizmodo.com/5212251/att-introduces-particularly-creepy-familymap-snooping-service">Link
I'd say that while I guess this could be good for something, I really can't get past the creep factor.
If you really can't trust your kids/spouse/whoever, I'd say there are bigger issues.