And can be used to cross-correlate with other datasets to further narrow down who you are and how you can be targetted.

I love that a poor, stupid man like me is being targeted by teams of the smartest data analytics professionals on the planet.

Makes me think of DraftKings. You take your average 20 something sports fan - drinking beer, watching the game. And, on the other end of that smartphone display exist some of the most complex algorithms ever designed by teams of mathematics / statistics PhDs and it's deliberately built around targeting... this one guy from Florida who is pretty sure his team will be up by 7 at halftime.

Maybe it's more of a morbid joke, but it makes me laugh to think about.