FreeRepublic argued under the Fair Use provisions of the Copyright Act that it was allowed to repost full length material for purposes of discussion, and that this was necessary because the original material was subject to change without notice, including complete removal/destruction of the subject material. The judge didn't see it that way. "That's all she wrote."
We will have to be more creative and work harder to keep archive material within grasp, and to be alerted when the facts mysteriously change, but that shouldn't be a problem with a little bit of applied technology and some sweat.
JMHO.
Thanks