No they don't.<p><a href="http://en.wikipedia.org/wiki/Hazelwood_v._Kuhlmeier" rel="nofollow">http://en.wikipedia.org/wiki/Hazelwood_v._Kuhlmeier</a>
<a href="http://en.wikipedia.org/wiki/Morse_v._Frederick" rel="nofollow">http://en.wikipedia.org/wiki/Morse_v._Frederick</a><p>I consider these decisions disgusting, wrong, and anathema to the Constitution, but there you are.