The theoretical possibility of a black hole being created is not what people think it means. To create a real black hole you need a massive star to collapse, supernova. LHC is simply not able to do this, if with its ability to create energy this black hole would appear and disappear nearly instantly because its not created with the energy required to sustain itself.
Thats how it was explained to me, if any physicist can correct me please do but we have nothing to fear from this but a chance at greater insight into the universe and our existence.
Yay for LHC!
