Roku also stated that it actively cooperates with reports of channels that infringe copyrights. This provision must not infringe on Constitutionally protected free speech. Modding may sometimes infringe the legal rights of the copyright owner. He affirmed that "The Da Vinci Code" does not infringe upon copyrights held by Perdue. Furthermore, compulsory voting may infringe other rights. Some of Churchill's pieces may infringe copyrights. However, Novell maintains that Mono does not infringe any Microsoft patents. Torrentz counter-claimed on this request, claiming that the links did not infringe any copyright policies. The jury found that Google did not infringe Oracle's patents. The court held that the newspaper photographer did not infringe the official photographer's copyright. Bundy alternatively argued in legal cases that federal grazing rules infringe on Nevada's rights. Blackberry Limited alleges that many features of the Facebook messaging service infringe on Blackberry patents. Otherwise, the employer did not infringe the law. Megaupload also employed 20 staff dedicated to taking down material that might infringe copyright. Unlike videography, still photography does not infringe copyrighted choreography.