Just to point out a bit of an overly binary comparison: There is a middle ground here — consider a powered-off, pre-paid phone. No constant texting and so on, but also there for emergencies (in which instance, you turn it on exactly when you actually want to be tracked — by emergency personnel).

"911, 911, we had an accident because everybody in the car kept texting and facebooking during the whole ride. 911, 911, it's a good thing we have cellphones and tablets with us!"