I am not concerned at all about CERN destroying the world. I am more concerned about CERN never working. How many years of a non-functioning particle accelerator will it take for us to start hypothesizing about how just how bizarre (and probably simulated) our universe is?
It looks pretty real to me, that simulated universe, and that is quite possibly all that matters.
Everything else is philosophy, CERN is concerned with physics.
If they get it to work (and I'm pretty sure it will work, they have a pretty good track record there) chances are that they will discover some interesting new bits of data that will get us one step closer to a UFT and a better understanding of how all of this began.
That's worth some money, more in my opinion than another useless war or some lets-make-jobs project.