Yale and free speech

Anyone who remembers the Duke rape case must by sympathetic to the letter Harvey Silverglate writes here on behalf of the president of Yale. Speech codes and restriction of free speech rights, conferred by the First Amendment, as practiced by schools all over the country are the subject of Silvergate's book on the subject as well as this letter.  It is hard to argue with Silverglate's basic argument that compromising free speech rights is a slippery slope leading to unfree speech rights and, by extension, totalitarianism. This argument makes sense.