The Electronic Frontier Foundation is attempting to overturn a US copyright provision that can stop people from doing anything from remixing videos to fixing cars. In a lawsuit filed today, it argues that the Digital Millennium Copyright Act’s rules against circumventing copy protection — designed to stop people from pirating copyrighted works — places unconstitutional limits on free speech.The EFF filed suit on behalf of Johns Hopkins computer science researcher Matthew Green and hacker / inventor Andrew “bunnie” Huang, both of whom argue that the DMCA’s rules are impeding their work. They’re seeking a confirmation that the framework is restrictive, over-broad, and a violation of the First Amendment. It would be a major blow against one of the most controversial, and most unnecessarily harmful, sections of the DMCA.The lawsuit takes on what are often called anti-circumvention rules or “Section 1201” rules, which ban any attempt to bypass a system that protects copyrighted work. They’re intended to stop people from doing something like stripping out the DRM on a movie and uploading it to a piracy site, but that’s come with a host of unintended consequences. Green, for example, argues that he can’t investigate computer security vulnerabilities in without worrying about being held liable for breaking a copy protection system in the process. Huang, meanwhile, says that he can’t build tools for legally capturing and editing digital video because of a copy protection system that limits viewing video over HDMI.