Re: What if you leave your phone at home?
So you leave your phone at home with the missus / kid to respond to the SMS. Add in a few missed SMS when you're actually at home, for reasonable reasons like sleep, bathroom break, etc, and the Polis will soon get fed up of visiting to check on you. Then you can go out and about with impunity.
Tracking somone's phone proves nothing other than where their phone is.