I like your definition, crow. Most of the human activities that I witness are insane. In my experience, people are generally too self-absorbed, disconnected, scared, brainwashed, etc. to step away from themselves and realize or change their ridiculous behaviors.
edit: To most people, habit, comfort, and normalcy are sacred, and everything else is terrifying and foreign. Sometimes it is important to break habits just for the sake of breaking them. Then, from the outside, judge whether the behavior is insane or not.