Dancing Hoskuld
Deity
Never heard about human sacrifice? Wow... There are lot of case in Africa, some in Haiti and South America. Yes, in area with a "culture" of Human sacrifice, but I have no idea how this can be implemented...
And for cannibalism, far less case, but some are realy creepy. My original idea was only when starvation, but that need a new tag (but can allow a Black market Crime and some others things)
When a city goes into starvation I can see the crime cannibalism happening but not based on crime level. Which means it would need to be built by a different mechanism just as the disease: kuru is. That is not a problem and could be implemented quite quickly.
So that is two that you have convinced me should exist, but I am not convinced about the off events. Having them only turn off by turning the world view on is not enough.