An article on Gizmodo about how Apple tracks down leaks is very interesting, assuming it’s true.
“Apple has these moles working everywhere, especially in departments where leaks are suspected. Management is not aware of them,” he told me, “once they suspect a leak, the special forces—as we call them—will walk in the office at any hour, especially in the mornings. They will contact whoever was the most senior manager in the building, and ask them to coordinate the operation.”