scariest person

[El Kabong]

for me scary means the person has no hesitation to kill. also someone really emotionally or mentally unstable/sick is frightening for me because you cannot reason with them.

I think "scariest" would imply someone who would knowingly and willingly torture and torment someone allowing their screams and pleas of mercy to go unanswered. But there are different types of "scary" which is why I varied my answers.

Albert Fish did that kind of thing OOOH also Gordon Stewart Northcott was like that....demented bastards.

I think Boris Karloff was scary because of his demeanor on film, his presence on radio, he was just a creepy dude as an actor. My niece (whom I've introduced to Abbot & Costello and my brother has introduced to the old 'Inner Sanctum Mysteries' radio program) is terrified of Boris Karloff, so that whole scary deal still plays today. Yes, yes, what an odd kid she'll turn out to be knowing about those comedians and that radio program, but old stuff is fun.

Max Shreck of 'Nosferatu' fame was a creepy son of a bitch too!