It is not the dstn overfly of 100 plus minus miles that is so dramatic, but the fact that they flew over 600 miles with no radio comunication. Having a discussion in the cockpit with no scan of instruments. Sure, they were wide awake, attentive, and professional. Now the cry will be, approve nap time for all crews. Unable to work for three or four hours with out taking a nap. Boy, how times have changed. Give them the benefit of doubt - why?