The constitutional and other legal protections that prohibit or limit government censorship of the Internet in some countries do not generally apply to private corporations. Corporations may voluntarily choose to limit the content they make available or allow others to make available on the Internet. Or corporations may be encouraged by government pressure or required by law or court order to remove or limit Internet access to content that is judged to be obscene (including child pornography), harmful to children, defamatory, pose a threat to national security, promote illegal activities such as gambling, prostitution, theft of intellectual property, hate speech, and inciting violence.