How many operational failures were there, exactly? I think it was at least 2 or 3 fairly large setbacks, right? I guess the problem here is just how damn long the system takes to cycle up and down. I imagine if the LHC could turn on and off within a few hours we would have seen the entire facility blow up if the theory were true.

I propose an alternate theory in which the LHC does destroy the world thereby never allowing time travel to be developed.