"... but what about when your ISP literally edits your web traffic, inserting more ads, and possibly breaking webpages."
It is possible the ISP not only injects ads but injects unique identifiers that the user never sees. These could be used to track the user across different devices and networks. This possibilty was suggested a few years ago by a well-known cryptographer in a presentation titled "How to manipulate standards".
It is possible the ISP not only injects ads but injects unique identifiers that the user never sees. These could be used to track the user across different devices and networks. This possibilty was suggested a few years ago by a well-known cryptographer in a presentation titled "How to manipulate standards".