if you consider the main arguments of CERN for the safety of the LHC, i.e. cosmic rays and Hawking radiation, you only have to google a bit and use Wiki to find out that these arguments are quite weak:

for example: according to Hawking's theory, black holes with a mass < 1000 tons explode. Questions: why are there supposed to be black holes weighing more than 1000 tons, i.e. how did such BHs come into existence at all ? why don't we observe exploding black holes ?

as for the cosmic rays (those high energetic particles relevant): have you ever wondered how they measure them ? Simply put: they hold a piece of plastic towards them, clean the fissure caused by the cosmic ray with Sodium Hydroxide and calculate from the size of the fissure both energy and charge of the particle. Now, that's what I call accurate

just read through corresponding Wiki articles and you'll notice such contradictions and strange ways of supporting Hawking's theories.

If you don't want to read, just watch these:

http://www.youtube.com/watch?v=170Y5GqDutg
http://www.youtube.com/watch?v=KCIdO7q6w40