Remember how people around the web wasn't happy about Google tracking practices for the sake of "improving" advertising? Well, it seems some U.S. ISPs are doing the same using deep packet inspection, not only used to disrupt P2P traffic it seems. For now, nothing is confirmed about what and how is being tracked, and although some ISPs list such practise in their service agreements, it's not that it appears bolded among the rest of the text. Oh, and BT is also going to test it in the UK.
via The Tech Report