There is no way to exile users and delete their posts. In the video below, you can see I go through 16 whole pages of spam by ONE ACCOUNT and at the end I exile him and remove all his posts. But the function simply doesn’t work when there are tons of posts from the user. It won’t refresh the page or remove any posts, or exile the person.
What is funny, however, is how all of the links in their posts got filtered.