Freedom of speech is unrestrainable. Speech can be malicious, ignorant, or spiteful, but a society without the freedom of speech or expression marks the slow decline of that society into a bleak, illiberal future.
But how do we define “freedom of speech?” Although the term is incredibly vague and has yet to be fully defined, we recognize that, according to the First Amendment, “Congress shall make no law…abridging freedom of speech.”
Speaking from a legal standpoint, the freedom of speech includes the freedom to use certain offensive words and phrases to convey political messages under Cohen v. California, or the freedom to engage in symbolic speech, such as flag-burning, or participating in a boycott, under Texas v. Johnson and United States v. Eichman, respectively.  Of course, there are notable exceptions to this freedom. Specifically, we are unable to incite actions that would harm others, such as shouting “fire” in a crowded theater under Schenck v. United States.