[aaron695]

They have been photographing every single letter for a while now.

And because of Moore's Law and cross-referencing databases now we can analysis it in depth.

This is networks of people they can watch. Like if your mum writes to your childhoods mate (who now you drug dealers) mum and tracking were you live and the same as any internet spying, working out if are you gay or a communist or a gay communist and cross-referencing handwriting.

They are also photographing your garbage. And can get your DNA from the sewers (although this might not have ever been used... publicly) License plate and phone tracking goes without saying.

There's no reason ShotSpotter (which can get some local voice audio) can't be matched to your podcast.

Meat world tracking is the new cool.... and it's nothing like 100 years ago.