From Scientists get death threats over Large Hadron Collider

Quote
The new report published today provides the most comprehensive evidence available to confirm that nature's own cosmic rays regularly produce more powerful particle collisions than those planned within the LHC.

The LHC Safety Assessment Group has reviewed and updated a study first completed in 2003, which dispels fears of universe-gobbling black holes and of other possibly dangerous new forms of matter, and confirms that the switch-on will be safe.

The report, 'Review of the Safety of LHC Collisions', published in the Journal of Physics G: Nuclear and Particle Physics, proves that if particle collisions at the LHC had the power to destroy the Earth, we would never have been given the chance to worry about the LHC, because regular interactions with more energetic cosmic rays would already have destroyed the Earth.

The Safety Assessment Group writes, "Nature has already conducted the equivalent of about a hundred thousand LHC experimental programmes on Earth - and the planet still exists."