Said employee enjoys immunity from prosecution in the United States.
The US prosecutes foreign hackers operating on behalf of other countries all the time. They're rarely apprehended for obvious reasons, but the US is playing a very dangerous game with the liberty of their own hackers.
All said, most of it is political posturing and I don't expect people to be eradicated or disappeared but that is a very real possibility in some countries.
When it becomes "fun" is when you're at Defcon and you see people that also recognize you, but both of you know you're on opposite sides.
So the US isn't playing any game that other countries aren't. Unless you work in the US govt. in one of these agencies doing this type of work, respectfully, you are looking at it from a tainted lens.
Bullshit. Millions of people have directly lost their lives due to the actions of the American government and citizens. Where were the criminal proceedings and due process for "collateral" damage in dozens of countries worldwide?
https://en.wikipedia.org/wiki/Anwar_al-Awlaki
https://en.wikipedia.org/wiki/Killing_of_Abdulrahman_al-Awla...
(To be fair, most countries have vague laws and corrupt courts so having a court in country X decide that someone should be executed is hardly any better, in practice, than having Barack Obama order the execution.)
There shouldn't be any supranational entity. In a democracy, governments should be accountable for their doing.