All sort of rumors about the supposed dangers of LHC operation can be found on the web. A few years ago, the possibility of producing black holes, strangelets and whatnots during proton-proton collisions was put forward, and CERN itself had to commission a report and publish it on its own website, in order to reassure public opinion. However, as the start-up deadline approaches, these rumors are getting stronger and one can watch a good collection of millennialism addicts showing off on YouTube on the subject.
If you wish, you can find as well a few sites conducing a self-righteous campaign against LHC.
Don’t look at them too long if you are easily impressionable, though. I did yesterday and after I while I was feeling uneasy. This guy almost managed to scare me. True, at some point he stated that his credibility was supported by his discovery of a magnetic monopole in 1975. And I must admit I felt somewhat reassured by such a claim.
In any case, a new possibility had recently been added to the panoply of potential exotic scientific outcomes of LHC experiments. LHC could prove to be a time machine of a sort. Unfortunately, practical applications are excluded for the moment.
Shame. LHC could have been the first large particle accelerator to start its first experimental run well within the original schedule. Retroactively.