Also spies is really an overarching term and means shedloads of different things in reality.
I mean if you break it down in the simplest way possible (for example what the public see on TV and call a spy), what they are seeing is various people who are:
Not really, some spies have official diplomatic status. Their public job title may not be "spy", but it's generally assumed that the host country knows what's up.
I actually liked "talking audibly" better... it reminded me of the movie "Naked Lunch" where Bill Lee was conversing "telepathically" about something completely different from the inane verbal chit-chat he was having with Tom Frost in the medina... http://www.criticalcommons.org/Members/adiab/clips/FF_Cronen...