I've disagreed with you on many things, PD, but you are 100% correct on this. As is often the case with aviation, nothing gets changed until someone dies. These things are horrible, would involve last flight out, first flight out legs, which are inherently the ones suffering from delays, and are cumulative with sleep deprivation. If something were to go seriously wrong on day 3, it would be very easy to make a big mistake. Plus, we are not in a concessionary environment; why in the hell would we be opening pandora's box with these things? They shouldn't even be considered IMO.