Mass Graduations

I don't know how accurate this is, but I found it interesting (found it at helloproject.wikia). It tells of harumageddon, events in H!P history that has caused fans to abandon the project. I never heard of it; does anyone know more?:

"On July 31 2002, a major reform of all of the groups within Hello! Project began, which was referred to as "Haromageddon" (ハローマゲドン) (a pun on Hello (ハロー, Harō) and Armageddon (ハルマゲドン, "Harumagedon")) and "the 7/31 incident" by fans.

Beginning in 2006, with the graduation of more and more Hello! Project members, an increasing number of fans began to lose interest in the groups and abandon them, cancelling their fanclub memberships and refusing to buy merchandise.

During the concert (the 2009 graduation of the elder club), fHello! Project leader Nakazawa Yuuko passed her leadership position to Morning Musume leader Takahashi Ai. This mass-graduation caused another large surge of fan backlash, resulting in even more fanclub cancellations and merchandise boycotts, and is considered the "third coming of Haromageddon". Later in 2009, several of the old, dormant units were revived. Tanpopo, Minimoni, Petitmoni, ZYX, Aa! and v-u-den all returned with new line-ups, and High-King returned from hiatus with its original members. These groups became a new concert unit, "Champloo"."