Of course, most people with brains know its been mathematically proven the ruddy thing'll bring about time travellers before it blows up the earth.
.. Seriously, someone turned out a paper detailing likelihoods, and rated the chances of the LHC creating at full power a viable 'target' for a time machine (possible in certain theories) that could send travellers back from the past, infinitely higher than the chances of the thing destroying the world.
'Thing hasn't turned gone up to full power yet, either, you know.