right.... Just THINK what that would require! The desire, planning, getting accomplices...and the difficulty of hiding it...so many would have to know! And the danger BEFORE triggering it.

from this blog

"Why do people believe things that aren't true? Mass delusions remind us of something counterintuitive: Bad information survives by building constituencies. You'd think that a crazy idea would have a tough time persuading lots of people that it's true, but crazy ideas find safety in numbers. It's hard for one person to believe something nutty, but easy for 20 people, and if several thousand people sign up for the idea, their group can probably get tax-exempt status."