I've often considered starting my very own house haunted attraction. But to me, so many aspects of everyday life are more terrifying than all of the Jasons and Freddies combined (but maybe not Micheal Myers, he haunts my dreams to this day).
The underbelly of humanity is most frightening to me, those things which hide from the sun and are intended not to be seen. Taking something that 'is' and grossly exagerrating it to become something that shouldn't be, is truly horrific.
I once heard that cannibals refer to humans that they intend to eat as 'long pigs' and butcher them as such. I've never quite been able to remove that imagery from my mind.