The US Supreme Court hears arguments this week in the US government’s appeal of a Philadelphia court ruling that the Children’s Internet Protection Act (CIPA) is a violation of the First Amendment. “The law, enacted in December 2000 in part to protect minors from access to Internet pornography, requires schools and libraries to use the filtering software to shield minors from adult material but, because it called for adults to get permission to access certain information, it raised the ire of the civil liberties and library groups. The law also blocked federal funding to libraries that did not install the software.”