The phrase "feet of clay" comes from the Bible (http://en.wikipedia.org/wiki/Feet_of_clay), and Paul certainly emphasized over and over how all people are sinners — so you would think that Christians, at least, would have learned by now that blindly following a charismatic religious leader often results, ultimately, in disappointment, disillusionment, and dissolution of the church in question.
On the other hand, we make the same mistakes in personal relationships, too. In fact, there's probably a lot of similarity there.
How a Megachurch Melts Down
What the dissolution of one of America’s fastest-growing churches means for evangelicalism
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That phenomenon isn't limited to "megachurches," either. It just draws a lot more media attention when you're talking about aggregate congregations in the thousands rather than the dozens.