The law of averages works in some cases with a crowd and not in others, especially when the crowd is influenced by an outside source or event, then the way of thinking can be shortsighted and narrow producing unfavorable results. One might argue at that point that the crowd in no longer a crowd and considered a mob. The difference being the driving factor, rational thinking or emotional response.
"Frank's Redhot - I Put That **** On Everything!" ~ Ethel