Sorry, I just remembered: Titanic. For sure everyone that embarked on that ship was more worried about other things like: financial troubles, health problems, love affairs, etc... after all, the ship was built to be unsinkable.

Regarding the LHC, the mentioned risks are black holes and strangelets. What about the things no one has thought about? The truth is, no one knows what might come out when we open the pandora box.