That'd just be fucking retarded. Cut Russia off from the internet? In addition to being an exercise of a theoretical power that shouldn't even exist, that'd give them an excuse to go make its own nationwide intranet, then they can have complete control over information just like China. It might even encourage them to join networks with China and their Central Asian stooges to make an alternate internet Cold War-style, ensuring billions never see an inkling of Western influence or thought again.

TBH if I was Putin and a bunch of American multinational corporations said they would pull out of the country if I invaded somewhere, I'd see getting their hostile foreign influence out of my country as a win-win situation, let alone having an excuse to permanently block all foreign online dissent.