"They have tried to recreate dark matter, reveal extra dimensions of and collapse matter into microscopic black holes."
The missing word was slightly irksome. I find the claim that anyone has intentionally tried to create microscopic black holes bombastic.
CERN's own site:
"According to the well-established properties of gravity, described by Einstein’s relativity, it is impossible for microscopic black holes to be produced at the LHC. There are, however, some speculative theories that predict the production of such particles at the LHC. All these theories predict that these particles would disintegrate immediately. Black holes, therefore, would have no time to start accreting matter and to cause macroscopic effects." - http://press.web.cern.ch/backgrounders/safety-lhc
They have certainly looked into it for safety sake but if CERN's intent was to create microscopic black holes, I suspect it would be a very different machine.