I'm not so sure, I think I'd rather be spied on by my own country.
Meanwhile international diplomacy's track record is clear.
But there are exceptions. China has gone after supporters of the Dalai Lama globally. Dropping malware, backdooring servers, etc. But yes, they can't arrest you.
The US, on the other hand, has more "friends". Consider The Pirate Bay. Even Russia has turned over "cybercriminals".