In case you are worried about the LHC destroying the world you can check the status of the current situation by visiting this site: http://hasthelargehadroncolliderdestroyedtheworldyet.com/

I'm only joking of course, no need to panic just yet. We can all panic later when nobody finds the Higgs boson and we all need to come up with better theories to explain the world around us. And I'm not the only one who thinks so. Stephen Hawking said in a BBC interview that "I think it will be much more exciting if we don't find the Higgs. That will show something is wrong, and we need to think again. I have a bet of one hundred dollars that we won't find the Higgs." In the same interview Hawking mentions the possibility of finding superpartners and adds that "whatever the LHC finds, or fails to find, the results will tell us a lot about the structure of the universe."

Whatever happens, I'm sure there are other things out there with better possibility of destroying the world. The LHC is what people call science, these days. Just sort of more elaborate and expensive