[prophetjohn]

Or instead of locking it, you could just have a "Last modified" time stamp or a log indicating when modifications were made.

[tseabrooks]

Well. There might be legitimate things that need to be corrected. Spelling / Grammar for instance. Why not have the last modified and a history. Save off the diffs so you can recreate the older versions for potential employers.

Another option is that a new revision generates a new random string for the URL and that revision is always available there.