Stereotypes of evil and menace

What do you consider the most powerful and scary stereotypes of evil in your society? In the West, perhaps "terrorist" and "serial killer" might spring to mind. In Africa, "witch" or "zombie".

But if you want to find something pretty horrific, try Googling mom's boyfriend or mum's boyfriend. It seems to to be right up there with the others.

Hat-tip to The Western Confucian: Mom's Boyfriend.