You might not know it, given the many headlines focused on new questions about copyright and Generative AI, but the year’s biggest copyright case concerned an old-for-the-internet question: do ISPs have to be copyright cops? After years of litigation, that question is now squarely before the Supreme Court. And if the Supreme Court doesn’t reverse a lower court’s ruling, ISPs could be forced to terminate people’s internet access based on nothing more than mere accusations of copyright infringement. This would threaten innocent users who rely on broadband for essential aspects of daily life.

The Stakes: Turning ISPs into Copyright Police

This issue turns on what courts call “secondary liability,” which is the legal idea that someone can be held responsible not for what they did directly, but for what someone else did using their product or service. The case began when music companies sued Cox Communications, arguing that the ISP should be held liable for copyright infringement committed by some of its subscribers. The Court of Appeals for the Fourth Circuit agreed, adopting a “material contribution” standard for contributory copyright liability (a rule for when service providers can be held liable for the actions of users). Under that standard, providing a service that could be used for infringement is enough to create liability when a customer infringes.

The Fourth Circuit’s rule would have devastating consequences for the public. Given copyright law’s draconian penalties, ISP would be under enormous pressure to terminate accounts whenever they get an infringement notice, whether or not the actual accountholder has infringed anything: entire households, schools, libraries, or businesses that share an internet connection. These would include:

• Public libraries, which provide internet access to millions of Americans who lack it at home, could lose essential service.
• Universities, hospitals, and local governments could see internet access for whole communities disrupted.
• Households—especially in low-income and communities of color, which disproportionately share broadband connections with other people—would face collective punishment for the alleged actions of a single user.

And with more than a third of Americans having only one or no broadband provider, many users would have no way to reconnect.

EFF—along with the American Library Association, the Association of Research Libraries, and Re:Create—filed an amicus brief urging the Court to reverse the Fourth Circuit’s decision, taking guidance from patent law. In the Patent Act, where Congress has explicitly defined secondary liability, there’s a different test: contributory infringement exists only where a product is incapable of substantial non-infringing use. Internet access, of course, is overwhelmingly used for lawful purposes, making it the very definition of a “staple article of commerce” that can’t be liable under the patent framework.

The Supreme Court held a hearing in the case on December 1, and a majority of the justices seemed troubled by the implications of the Fourth Circuit’s ruling. One exchange was particularly telling: asked what should happen when the notices of infringement target a university account upon which thousands of people rely, Sony’s counsel suggested the university could resolve the issue by essentially slowing internet speeds so infringement might be less appealing. It’s hard to imagine the university community would agree that research, teaching, artmaking, library services, and the myriad other activities that rely on internet access should be throttled because of the actions of a few students. Hopefully the Supreme Court won’t either.

We expect a ruling in the case in the next few months. Fingers crossed that the Court rejects the Fourth Circuit’s draconian rule.

This article is part of our Year in Review series. Read other articles about the fight for digital rights in 2025.