i doubt that we'll survive to see any suspicious government agents if something does go wrong. currently, their seems to be 4 possible catastrophe scenarios predicted, 2 of which would very quickly destroy the whole planet, the third would destroy the whole universe, and the last... well i'm not sure what it would do... but probably something nasty too.
1) Micro black-holes are created and proceed to gain mass and end up engulfing the whole earth. while many scientists say its impossible to get black-holes in the energy level produced by the LHC, some scientists speculate that according to the mumbo-jumbo of the string theory, a fourth dimension of space exists (not to be confused with the traditional 4th dimension of time) and that by doing number crunching they can prove that gravity passing through that 4th dimension and the other normal dimensions can theoretically lead to the production of micro black-holes in the LHC at the rate of 1 per second.
2)'Strangelets', or extremely small clumps of 'strange matter' are produced. strange matter, when it comes into contact with normal matter, transforms the normal matter into more strange matter. thus the world might end up as a huge ball of strange matter.
3)i didnt quite get this one, something about True vacuum and False vacuum and whatnot, but i did understand that, theoretically, if certain conditions are met in the LHC, a bubble of 'true vacuum' would form and expand at the speed of light to eventually fill our whole 'false vacuum' universe, and this new 'true vacuum' has different laws of physics in it. meaning that all atoms, stars, planets, and life as we know it would simply cease to exist as the new laws of physics reform our universe.
4)the last thing is about the creation monopole magnets, meaning magnets having only a single pole. but i didnt see anything that might be dangerous in that...
all i can say, is that these scenarios are so far fetched that i can hardly imagine any of them happening
1) As already pointed out, micro black holes tend to evaporate quick. Some theorists even imply that we are already surrounded by micro black holes and th LHC would only increase their numbers slightly. And if a self sustaining b-hole manages to appear from the LHC we would have more than 100 years to deal with it before it gains enough mass to really start to tear the Earth apart.
2) If it happens the conversion would be so fast we all die before we realize what's happening. There's no doom if there's no one to witness it.
3) Same shits as 2)
4) Pure fantasy. Magnetic monopoles have no theoretical basis of any kind. They are the faeries of the scientific realm and are as real as XIX century's aether. In fact magnetism is a pure physical illusion like the Coriolis force. We only "observe it" because our frame of reference is moving in relationship to the frame of reference of the electrically charged particle that it's "creating" the magnetic field. Only electrical fields exist.