Perhaps this is where the real disconnect between the music business and the rest of the world happens. As one Verizon executive pointed out recently, if ISPs become responsible for copyright enforcement what else should they be expected to be responsible for? And what of privacy - at what point is an internet-bound communication considered private?
It's easy to lay the responsibility at ISPs' feet, but much harder to identify any benefit for them beyond the gratitude of the music and movie industries. If anythying it conceivably opens them up to liabilities they don't have now for essentially reading customers' confidential communications.
He also mentioned Radiohead's recent release of their album as a digital download with payment on a voluntary basis, noting that this didn't stop it from appearing on P2P networks. According to McGuinness this "showed that if not constrained, the customer will steal music."