And that kind of following around was what certain secret police forces did back in the day. And it was inefficient unless they already had a reason to spend ma

And that kind of following around was what certain secret police forces did back in the day. And it was inefficient unless they already had a reason to spend manhours on you. Now however the computer will do it, virtually for free, and then the hoard of data can be dug through for incriminating (or socially awkward) information.