I can say a forum member here posted on another forum he got 18 of the dice. DOesn't sound like "one guy monstered five hundred". The dice sold very well at Origins, which may contribute to the problems.
So unless someone wants to step forward and say "I'm the mad dice buyer, muhahahaha!", let's keep the rumors to a dull rumbling. No well-organised spontaneous angry mob with flaming pitchforks need apply ;)