So, what's the solution, here? It seems reasonable for a court opinion to include a copy of the source, if possible. What about for something like a YouTube video, which could disappear at any time, but can't be represented on paper? How would you agree on a digital format for representing a supreme court opinion?
Build awareness of the importance of the permanence of URIs and what they mean to Hypertext. The only full solution is a cultural one, not a technological one.
The only solution is some form of legalized archiving. We need the right to copy for archiving without profit, or something. Not sketching out a full, legal solution here, just pointing out that it has to include some form of right-to-archive.