Hustler versus Falwell is one of the most important cases dealing with humor in the law. Jerry Falwell sued Hustler magazine after they ran a fictionalized interview with him. The Supreme Court case has set the precedent for how parody is protected by the First Amendment.
In 2016, a man named Anthony Novak created a parody Facebook page of his local police department. "I just thought, 'That would be funny.'" About a month later, he was arrested. Novak is now petitioning the Supreme Court, and The Onion submitted an amicus brief in support of his case. Their brief is written as a parody of an amicus brief.