We’ve all been there, the fasten-your-seatbelt sign is illuminated, the plane is taxiing, air hostesses line the aisles and everyone is asked to switch-off any electronic devices as they may interfere with the airplanes instruments, or some such drivel. But, how much truth does that bold statement actually hold, could a simple text message or something of the like actually have a severe, adverse affect on your flight? The Wall Street Journal (WSJ) investigated…