The startup of the Large Hadron Collider on Wednesday is not going to end the world. Get over your ridiculous doomsday-fearing selves. It should provide an awesome window into the universe, NOT destroy all life as we know it.
If it makes you feel any better, if the world does end, you'll have the last laugh. And won't I look stupid then?
EDITED TO ADD:
Oh! Oh! You can use this to check: Has the Large Hadron Collider destroyed the world yet?