I think you're onto something. I also think this falls into investigative journalism - which used to be able to drum up funds for that sort of cost.

There are all sorts of problems like this. What could you learn from the browsing history of people that work in sensitive areas? i.e. nuclear facilities, national labs, financial/industry regulators, etc. City and state representatives probably give away a lot through browsing. There's plenty of low lying fruit ripe for exploiting in huge ways.

Another avenue: merely knowing when someone is likely to browse the internet tells you:

-they're awake

-they're at home/indications of their location

-their level of awareness (think security workers or even prison guards)

Imagine being able to figure out the best time of day to hit a bank by browsing history? In an aggregate way you could probably figure out staffing (corporate level) or whether someone's home (residential level).

I've always liked the idea of using the copious public video of these politicians to train voice and face recognition NNs, specifically targeting anti-privacy politicians. Maybe even sell pre-made raspberry pis with all of this stuff preloaded for journalists to scatter around places that politicians congregate.

I think it's only fair that these folks get to be the first ones to live in the kind of world they are creating. And none of them should have a problem with any of this, because I'm certain none of them ever do anything wrong and therefore have nothing to hide.

Getting the information through their ISP may be too subtle. Just send them a FOIA request for the browser history. When they ask why or deny it, you can raise the question of why they want to keep their information private, but allow our information to be fair game.