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Carol HaynesNice article but nothing new :p
Seriously: any "metal connector" can be used to get your data, with no difference is it a power cord or heater pipes. There is only the question: is it cheaper than using a crowbar on user?
BTW I remember reading once that some guys retrieved screen data using telescope pointed at screen's light reflection from the wall on the opposite side of the room. That is something to think about.