Some of the scariest people I've ever met fit into that category. Like the scary nerdy guy who lined up cereal boxes in his shared office so he could have breakfast in the morning. He had no time for breakfast at home
because he spent all day screwing his skank wife in more positions than any of us wanted to think about.
(And just to complete the picture for you, this sicko actually said he wanted to fence in all the black people in America in the inner cities to round them up, etc. Some people deserve to be flattened by asteroids.)