Can the Nav System's GPS act like LoJack?

I recently bought my '05 Prius and when I was asking some questions about the Navigation system, the not very knowledgable sales associate told me that the GPS can act like a tracking system. He said that some people get it instead of LoJack. Clearly if the thief simply detached the battery, this would be useless but I didn't bother to tell him this obvious piece of information.

Although this makes some sense in that the Prius knows its position, it seemed unlikely that it is transmitting this information to anything but the MFD. I just shrugged this off at the time since I figured that the Key Fob is so advanced that the car is unlikely to be stolen for anything but parts and there just aren't enough of the '04s and '05s around to make that worth while (yet)

Has anyone ever heard of a stolen car being located using the GPS/Navigation system?