Real animal slaughter does add a vital element of danger to films such as Cannibal Holocaust, hence the term "guilty pleasure".
It can't be condoned, but it's been done and this kind of work exists so there you go.
Fortunately very few filmakers in very few countries could get away with it today.
Hold on, I've just remembered: all the animal killings are faked - it's the human killings that are real.
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