And while I agree with you, our society and its attendant legal system have become so calcified with notions of “legal rights” for these out-of-country actors that we will never authorize it. People need to realize that the Constitution and Bill of Rights stops at the nation’s borders. Most of these cybercriminals operate the United States. They should be fair game.
But as I also stated, the Russians never cared for such “legalisms” and they will go kill these people if they get a chance.
If you are in another country and you break their laws, they can and do damn near anything they want with you, and there isn't a damn thing the USA will do to protect you, because they can't do more than a strongly worded protest. You can be thrown in jail for life in a dungeon for shoplifting.
When I was in the Navy, they told us that if we break the laws of the country we are visiting, we are on our own. There was a sailor who was arrested for buying and using drugs, and he was still in the same prison after two separate deployments. And the Navy made sure we knew about it.
If you are not a citizen and you break our laws, you have no rights, IMO. Or, rather, you should have no rights.