That's true, but the easiest way not to get caught is to not do it at all. Presumably spying on friends may be needed someday, but it brings the kind of diplom

That's true, but the easiest way not to get caught is to not do it at all. Presumably spying on friends may be needed someday, but it brings the kind of diplomatic flamefest that should keep such spying restricted to Very Important Things and not just "we'll tap them because their numbers fell in our lap".