At issue is whether internet providers can be held liable for repeated copyright infringements of users, with potentially billions of dollars on the line.

The US Supreme Court heard arguments on Monday on whether internet service providers should be held liable for the online pirating of copyrighted music by their users. "That could be entire towns, universities or hospitals, turning internet providers into internet police," he said.

The US Supreme Court heard arguments on Monday on whether internet service providers should be held liable for the online pirating of copyrighted music by their users. "That could be entire towns, universities or hospitals, turning internet providers into internet police," he said.

At issue is whether internet providers can be held legally responsible and be required to pay damages if they know customers are pirating music and don't stop them.