Zippy Deedoo is worried and needs advice and writes: "Nothing makes me more angry than people who make lists of categories of people that they hate. In fact, I'd go as far as to say that the list of people I hate comprises solely of those people who make lists of people who they hate. I have an acquaintance who has made such a list - how do I inform them that I now hate them?"
Well, Zippy Deedoo, you have quite a quandry there. I would suggest that you merely tell this person you hate them and then add them to your list of people you hate. You won't win any friends, but who cares? You may then also hate yourself, which is a different issue entirely. Hope that helps, ZippyDeedoo.