Can you please turn down the hyperbole a few notches? People have been looking at the moon for thousands of years with no ill effect.
People have been smoking cigarettes for roughly 150 years and "experienced no ill effect". And then, suddenly, medicine has discovered that people
did in fact experience ill effects. Whether or not you're a skeptic is none of my concern, but please, try to come up with a legitimate excuse to dismiss a warning, at least in public.
See also: petrol, alcohol, leeches (which used to be a "cure", mind you), STDs, etc.