It was invented as protection in places that are far busier than your average CTAF but still towerless. Point Cook And Mangalore have more movements than almost any other ctaf in Victoria that I can think of with somewhere in the vicinity of 100 full time students at each, and calling the numbers is not just for the aircraft turning, but for the aircraft in front and behind. Someone calls number 1, when you know you are, " confirm you are number two" resolves it most of the time.. If not and you can't find the traffic, bug out.. Can't see the problem with it..