content: This is a good assumption to make from a privacy standpoint, but it's not practical for the ISP to do this to everyone. Even after aggressive compression they'd have terabytes of data every minute that needs to be saved and stored. Where would they put it? There are certainly traffic reports they save for long-term analysis, but deep packet inspection (not to mention total traffic storage) is usually used for traffic routing and then abandoned unless you're on a particular watchlist. The only place that may have the ability to store everything is the government or military, and they're certainly a whole new class of fears than your local ISP or a nondisclosure lawsuit.