G'day Carl,
This just came to my mind: If the policemen removes the servers, doesn't they break the GFDL?
I think, in the hypothetical case of a police invasion of Wikimedia headquarters, the *last* thing on those cops' minds would be whether or not a few mirrors are linking to our page histories for GFDL purposes.
Cheers,
-- Mark Gallagher "What? I can't hear you, I've got a banana on my head!" - Danger Mouse