It does sound pretty extreme, but there is also such a thing as, you know, signal interference. If it affects the service on Russian territory, that's a reasonable request.
However, hopefully this means that Russia will give something in return. Agreements like this do not normally happen for free, so I think there's gotta be some other side to the story here.
Unless of course the Russian "offer" is "give us the buffer zone or we'll turn the Woodpecker back on!"
http://en.wikipedia.org/wiki/Russian_Woodpecker