Referring to your own impending downvotes in the opening of your post is a form of antagonism that creates a self-fulfilling prophecy. The idea is usually that

Referring to your own impending downvotes in the opening of your post is a form of antagonism that creates a self-fulfilling prophecy. The idea is usually that you can then use the downvotes as "evidence" of your correctness (of course, that's fallacious - downvotes can be for anything, and an antagonistic tone combined with portraying yourself as the underdog is one of the most prominent examples, regardless of the content of your post). And if you don't get downvoted - even better for your case! It's a cheap win-win for you.