It would not do what you think it would. "In practice, the right to freedom of speech is not absolute in any country and the right is commonly subject to limit

It would not do what you think it would. "In practice, the right to freedom of speech is not absolute in any country and the right is commonly subject to limitations, as with libel, slander, obscenity, sedition (including, for example inciting ethnic hatred), copyright violation, revelation of information that is classified or otherwise." Source Wikipedia.