The sky is falling!
If financial experts say "there has never been a significant collapse in the financial sector and we don't expect one now" then it is because the expect to make a profit from saying that.
Nuclear PR flacks might have said "there has never been a significant loss of life nuclear incident worth worrying about", but they if they did, they would clearly have been lying (Hiroshima and Nagasaki and Chernobyl).
Reports of leaks at Windscale used to be a regular event, but after they changed the name to Sellafield, the reports slowed down and stopped. The fire the core of windscale pile number 1 was caused by design flaws. Nuclear engineers will not make those mistakes again.
The three mile island incident released more radiation into the environment, but no deaths were attributed to it. Sickness was attributed to stress caused by reports on the accident (The reports were more frightening than the ones for Windscale.)
Chernobyl caused about 35 times more fallout than Hiroshima and Nagasaki. It caused about 50 direct deaths and around 9000 deaths from cancer. These numbers are very political. You could get different numbers from other sources.
Chernobyl and Three Mile Island incidents both involved running reactors that were not ready for operation. Perhaps we should delay building nuclear power plants until electricity is rationed, then build a dozen plants in a rush.
The Earth has not been eaten by vacuum bubbles, black holes or strangelts yet, even though it has been around for a few billion years. The Earth is made out of material ejected form super nova explosions. These explosions are far more powerful than LHC. If you are trying to say LHC is not safe, you first have to explain why LHC could cause a problem that supernovas have not.
If LHC could make vacuum bubbles with different rules of physics that grow without limit, then supernovas would have done this and we would not exist.
If miniature black holes did not evaporate promptly, then the Earth would be a black hole, not a planet.
If stranglets could convert normal matter into strange matter, the Earth would be made of strange matter caused by strangelets from supernovas.
If a theory is not consistent with the results of previous experiments, then the theory is wrong.
If the LHC is spending tax dollars on saying "LHC is safe" it is because they have to counter the silly law suit started by the modern day Chicken Lickens Walter L Wagner and Luis Sancho. I hope these two will meet the modern equivalent of Foxy Loxy and have to pay some extra taxes to make up for the waste they have caused.