End of Days

So that guy was wrong with his end of the world prediction. Now he says the world will end October 21st.

Remember a few years ago when the Large Hadron Collider at Cern was set to go online. Insane people that had little or no information were sure that it would cause a black hole to appear and destroy Earth. That was 2008. Time Magazine Article
What happened to those people with the predictions?

For a long time people have been saying that because the Mayan calendar ends December 21st, 2012, it must mean that's when the world will end. Maybe the guy chiseling the calendar into stone got bored and went to go see a good sacrifice.
Or this Or what about the Millennium. Weren't all the computers suppose to blow up then too.

Penn and Teller's show had a great episode about how throughout history there have been tons of predictions by people calling for the end of the world.

Here's a site that has over 200 past/failed predictions of the end of the world. Be warned, the website appears to be stuck in 1996.