Do you know where you are?

Guess what this is? Ok. The label beside it gives it away. Personal Tracking Device. It looks like a pad lock. I suppose you strap this around your elderly aunt, and you can find out instantly where she is via GPS, or maybe via GSM location. Incidentally there seems to be a call button on the device but no number pad to dial. Perhaps its only for accepting incoming calls and making a call to a special number. The idea is great for the right application - aging aunts and promiscuious teens. I wonder if the future will see a demand for these devices. I hope not.