In general, the government can regulate speech through content-neutral restrictions, but content-based restrictions likely will violate the First Amendment. A speaker may be liable for the content of their speech in certain situations, however, such as obscenity, child pornography, criminal threats, defamation, and certain personal insults that incite violence. Content-neutral restrictions often control the time, place, and manner of the speech or activity. Some content-neutral restrictions may not be constitutional if they are overly broad. The government has greater discretion to regulate speech in certain settings where it has a special authority, such as public schools and government workplaces.