Having lots of siblings is like having built-in best friends.
Let's say a Soviet exchange student back in the '70s would go back and tell the KGB about people and places and things that he'd seen and done and been involved with. This is not really espionage there's no betrayal of trust.
The betrayal of trust carries a heavy taboo.
Deciding whether to trust or credit a person is always an uncertain task.
Espionage for the most part involves finding a person who knows something...
Things come apart so easily when they have been held together with lies
Love all, trust a few, do wrong to none.
If you are a reliable, honest journalist, sources...