True enough that was talktalks argument. They were more concerned about the cost.Not sure isp's could care less TBH, VM block for a week or two at season start then never bother, looking at it from their POV why should they go out of their way to try and protect their main competitor's profits?
The court order we all talk about was taken out to force other isp's to block IPTV users, the very fact that they had to go to court in order to force them to do it speaks volumes.