Herd Behavior

How is it that so many people within a marital art system seem to believe things that are contrary to science, reason, logic, and common sense, such as knocking out a person without even touching the person? Is it that idiots unconsciously recognize each other and tend to herd together without realizing it? Or, is there another reason?

As a school of fish glides through the water, its movements are precise and synchronous. None of the fish dart ahead, lag behind, or drop off to the side. When the school turns, there is no confusion, no collisions, just perfect coordination. Insects, birds, wildebeests, etc. may also be seen moving in the same manner. Why are animals so good at mov­ing together?