We don't maintain an official Wikimedia Foundation Facebook page. In my experience, chasing down abandoned brand pages for an organization as large and widespread as ours is an endless proposition, and means we can't do other, more meaningful things. I can put these on my to-do list, which is pretty darn long. If a page hasn't posted in six years, you're not likely to find it unless you go looking for it. : )
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Jeff Elder
Digital communications manager
Wikimedia Foundation