Topic on All The Tropes talk:How to Get a Rule Changed

We already say that on the page: "Be polite (or at least calm), even if — especially if — the discussion isn't going your way. Getting snarky or insulting because you're not finding the support you want is not going to win you points with anyone."

As for users begging to be banned outright, I haven't seen any examples of that on this particular wiki. And we've been drawing new users' attention to our page on what is and is not bannable for quite a while now.