This thing about Russia buzzing our ships lacks one important detail.
The Russians do their playing around with their transponders active which means, on our radars, they are showing IFF (Identification Friend or Foe) long before they can be identified visually as being Russian.
They would signal as friend.
They know the risk of turning their transponders off and approaching our ships.
How does a nonallied aircraft signal `friend’ with its IFF unless it has the codes to do so? Sounds like spoofing.