Re: hack help
There is no author rank in the default installation. Are you talking about their title (like Member or Administrator)?
If so, you would need to modify the template file for each place where the title appears (maybe it’s only on the topic pages, for each post?) If so, just remove it from the post.php file in your template directory:
Remove this line:
<small><?php post_author_title(); ?></small>
That removes the author title from under the author’s name. If that’s not what you mean, then you have something installed that I do not. I think there is a post rating plugin and an author reputation (karma) plugin: maybe one of those is showing the rank you’re talking about.