You hardly have to join the CIA to become tell spy. In fact, these things are going on in all aspects of our overall society where people are using human intelligence gathering to get a leg up on their competition, whether it be in foreign negotiation, military effort, law enforcement investigation, or even in the modern day corporation.
If you are in business you need to keep quite a bit of information very close to the best, meanwhile you want the information about your competitors to flow into your hand. Information as it has been said is much like water, it wants to be free, it wants to flow, and more often than not it has a life of its own. In fact, if you have a few moments I would like to discuss this with you.