> There’s a reason we don’t implant GPS trackers into babies at birth just because they might get lost one day.

What reason are you thinking? I wouldn't support it myself, but I don't usually represent public opinion.

GPS didn't really burst into the public imagination before 2007 and the iPhone; in a sense the technology is only about a decade old or so in the public sphere. Prior to 2000 the US government's official position was something like "this is a military technology".

As the cost of sensors and radio chips goes down, we might reach the point where we do put a GPS sensor on everybody. Law enforcement would love it and on the small scale it would probably save lives and reduce crime.