This guest post by BC Law Professor and Associate Dean of Academic Affairs Daniel Lyons first appeared in the AEIdeas Blog.

Intermediary liability—when a company should be liable for users’ misuse of its product by users—has been a long-standing issue in tech policy. Two years ago, the Supreme Court dismissed a case alleging Twitter aided and abetted terrorism by allowing ISIS to recruit on its platform. This week, the Court weighed in again, hearing argument in a case involving a billion-dollar judgment against broadband provider Cox Communications for failing to terminate accounts suspected of copyright infringement. The case raises significant questions about copyright enforceability, broadband providers’ role as gateways to the internet, and digital equity concerns. The justices seemed doubtful that notification of user misuse was sufficient to trigger liability, although they struggled to find an alternative that balanced the equities of the case.