Lets say a Soviet exchange student back in the 70s would go back and tell the KGB about people and places and things that hed seen and done and been involved with. This is not really espionage theres no betrayal of trust. – Aldrich Ames

Espionage, for the most part, involves finding a person who knows something or has something that you can induce them secretly to give to you. That almost always involves a betrayal of trust. – Aldrich Ames