I take it you really don't know much about the doomsday clock. It's symbolic. It's supposed to represent how close humanity is to offing itself. And it's been around since 1947 so it's not exactly a new thing. As for "mad scientists", we're dealing with the board of directors for the Bulletin of the Atomic Scientists. This isn't exactly a bunch of random bloggers we're talking about.
I want to know how they will ever set the clock to midnight at the end of the world. Surely fiddling with a clock will be the last thing on anybody's mind when ten nukes are trained on your city or whatever. The whole thing is a waste of money.