The Law is a blunt instrument. It’s not a scalpel. It’s a club. If there is something you consider indefensible, and there is something you consider defensible, and the same laws can take them both out, you are going to find yourself defending the indefensible.

Neil Gaiman (b. 1960) British author, screenwriter, fabulist
Blog entry (2008-12-01), “Why defend freedom of icky speech?”
    (Source)

See Dershowitz.