Good question. Maybe: 1) People who have been around a while already know most or all of it, while people new to the scene know none or little of it. 2) It's

Good question. Maybe: 1) People who have been around a while already know most or all of it, while people new to the scene know none or little of it. 2) It's never whispered all at the same time, but rather one or a few at a time when the circumstance calls for it, kind of like a distributed consensus algorithm gradually coming to consensus. Also, easier to recall parts of the list when in the physical vicinity of people on it. 3) The newbies learn the whole thing gradually, not all at once.