If someone's downloading your copyrighted work illegally, suing them is no easy task. The only public facing information that identifies you to the internet are just numbers in the form of IP addresses. To actually get the name of the person doing the illegal downloading, intellectual property owners have to request or subpoena the information from Internet Service Providers like Verizon or Time Warner. But earlier this week, Comcast, the largest cable provider in the country, refused to honor court ordered subpoenas of customer identifying information.