With all the nonsense about the Earth being destroyed by Black Holes, Strangelets, Magnetic Monopoles etc, here is the CERN report to the general public including safety endorsements from various experts in astrophysics, cosmology, general relativity, mathematics, particle physics and risk analysis, including several Nobel Laureates in Physics.
http://public.web.cern.ch/public/en/LHC/Safety-en.html
Steven