Here we go again with an ISP monitoring users without consent and collecting information about their activities.
In this case the ISP claims to be doing so as part of a project to improve some future security and parental control services. They say that they are not capturing any data about which users visit what sites, but obviously the capability is there. The ISP did not announce this to their customers and only admitted it after it had been discovered and exposed.
Whether the ISP later decided to start capturing that information, the government makes them start capturing it, or a hacker get in to trick the system in to capturing, there is a real likelihood that users of the TalkTalk broadband service in the UK will have their activities captured.
Once again, this shows that you can't trust your Internet providers. Their business is not privacy and their interests do not run parallel to your privacy interests. Only tools which encrypt your Internet activity, like Anonymizer Universal, can protect you against this kind of surveillance by your ISP.