Business hype? Or personality cult?

Why do people do this? I understand fanaticism; I once was a fanatic about an artist. I also understand following trends; who hasn't worn bell-bottoms or gotten their ears pierced? What I cannot understand is: does ideological fanaticism necessarily lead to fanatical behavior? Will commercial hype always trigger personality cults? Or, do personality cults promote blind commercial hype? Facing various phenomena today (after the "treading on cats" incident, relatively extreme elements are getting more and more excited by treading, with all sorts of variations. Of course, there's also the "rising lotus" spectacle), shouldn't we calmly reflect on these issues, or at the very least judge whether they fall under "resource waste"?