Sure, I would be be happy with Apple's Anti-Theft version just as well but let's be honest: Did your parents enabled all services on their iPhone, iPad? MacRumors readers are not the average smarth phone user.
It surprises me how many reactions say: Let the police catch them. Do you have any idea how much time and money costs? (Which in the end you will pay.) Don't you think it would be so much better if the police could use their time more effectively?
Also, the comparison with car theft etc. doesn't stick. Your smarth phone is already part of a system (your car, bike, etc is not). It's a matter of writing a piece of software to implement this. This costs NOTHING compared to the insurence fees, countless hours of police work, countless jailtime that has to be paid for, frustrated smart phone owners, etc, etc.