I think that most of the general examples have been mentioned: Religion among others, which has the rather mildly harmful "fear of hell" and it's own propagation.
I think that any majorly harmful hazard which the general population was susceptible to would cause them to all shortly win darwin awards and remove themselves from the genepool.
As such we only have minority groups which are vulnerable to specific stimuli.
the rather mildly harmful "fear of hell"
The Typical Mind Fallacy is strong with this one.
remove themselves from the genepool
It's a good thing that isn't a mortal sin! Oh no wait.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Of course, for "every Monday", the last one should have been dated July 22-28. *cough*