Everyone can probably think of evil people on this planet, and may even have an opinion of who is the most evil, but I’m convinced that that title belongs to a rather anonymous person who we all know about, but we don’t know his or her name.
It’s the person that somehow figured out how to make smoke detector batteries die in the middle of the night, rather than at any other time of the day.
Evil. Pure evil. Makes Iago look like a cute little bunny rabbit.