[brundles]

I suspect they may struggle with this.

As dev mentions, blocking specific groups won't help as new ones will pop up - or other legitimate groups will be hijacked for the content. Meanwhile I'm not convinced that the structure and design of usenet itself makes policing it possible in the same way that a tracker admin can monitor torrent tracker sites removing offending content.

The thing I'm curious about in the Ts&Cs isn't so much when these companies will share customer information but what information do they retain that could be shared? If all they retain is account details (name, address, card details, bandwidth usage maybe) then it's not much use to anybody but if they retain records of what is retrieved that's another story.