Terry Pratchett said this quote

“ That’s why we all hate ’em, he thought. Those expressionless eyes watch us, those big faces turn to follow us, and doesn’t it just look as if they’re making notes and taking names? If you heard that one had bashed in someone’s head over in Quirm or somewhere, wouldn’t you just love to believe it? A voice inside, a voice which generally came to him only in the quiet hours of the night or, in the old days, half-way down a whiskey bottle, added: Given how we use them, maybe we’re scared because we know we deserve it… ”