When TAWS was installed on airline aircraft years ago, a friend returned from a trip to Europe and said he had gotten a terrain warning at FL 350 over the middle of the Atlantic Ocean. As neither he nor his FO could find any reference to a new mountain taller than Everest in that location, they silenced it and pressed on to London. His proposal at the time was to replace all the audible alerts with a continuous, 120 dB voice repeating, over and over, “DO NOT CRASH THIS AIRPLANE!” It would not have surprised anyone if FAA had taken that advice.