If this was a just world, US government would have nationalized starlink the second they saw Musk's company was aiding and abetting the Russian Military and hindering Ukraine's, which we saw in the early stages of the war.

But we all know that original premise isn't true.

Elongated muskrat hisses

Thats going to be a lot harder than a whitelist in ukraine unless the tankers are stupid enough to also dock at a Russian port with it turned on, which maybe they are, but then they just buy a new one and be smarter about it.