If the problem is having the knowledge hosted in one place only, controlled by "one" person only, the solution should be to decentralize, not make everyone able to copy it everywhere. Plus, this solution seems to add more work to the contributors, since you'll need to review each fork/edit and choose which to merge or not.

On the other hand, a wiki working like a P2P network, where everyone hosts the same version and edits are automatically propagated accros the web would solve the "problem" without adding more job on contributors.