ExXB, you are a well traveled person and you should know that what you are proposing is just not workable. There are many unexpected reasons for no-shows. The situation can change by the hour if not by the minute. It can come down to an accident closing the road into the airport or an ATC computer failure delaying inbound connecting flights for instance. Not all no-shows are a deliberate act by the would be passenger. Now back in the old days business travelers were guilty of making multiple bookings only to fly on one of them. That was one of the major no-show problems then. I'm not convinced that the no-show problem today is as excessive and deliberate.