This letter confuses Wikipedia and Wikimedia:
As you are aware, the Wikimedia community — which consists of independent volunteers operating separately from the Wikimedia Foundation — recently banned Wiki-PR and its agents from further editing the Wikipedia site. (...)
… and …
To avoid additional injury, the Wikimedia Foundation hereby demands that Wiki-PR, its owners, employees, contractors, agents, and anyone acting on its behalf or in concert with it, cease and desist from further editing of the Wikipedia website unless and until you have fully complied with the terms and conditions outlined by the Wikimedia community.