I wish people who didn't know what they were talking about would just shut up about Large Hadron Collider (LHC) going to be the end of the world. One of the latest is from a fairly believable source Oxford University who published this study. The argument is basically that since they were able to find errors in the calculations they've done to reassure us how can we possibly trust anything the people from LHC says.
Here is the scoop though, everybody can just chill. The reason for this is that the energies that shows up when using the LHC exists in the natural universe. They aren't common, or speaking quantum speak they are very improbable. However, if you take the volume of the Earth and a couple of eons they will have occurred tons of times during our history. And if all it took were a couple of freak super heavy particles to be created to swallow up a body like the earth there wouldn't be anything left but black holes anywhere in the universe.
So basically, since we are here now, there isn't anything to worry about with the LHC. All it is doing is making events that occur naturally (even though very rarely) occur in a more predictable fashion so that they can be more easily studied.
The only argument against the LHC I can think of that actually have some merit is if it is worth the cost. I think that in the long run it probably is, a lot of basic research on particle physics seemed pretty useless at the time it was done and is now providing us such neat things as faster computers, faster networks and more energy efficient technology.