Weelll. If you do like I do and have "also friend of ... " on your friends page (and the list gets massively long when people leave and don't remove you) here's what I do to ban_set a massive list and remove them.
1. Copy and paste the whole list into notepad. 2. Put a (comma+space) before the first username. 3. Edit, replace. - Find What: , (comma) - Replace With: <*br>ban_set (with a space at the end. This is important. And minus the * obviously.) 4. Save as .html file. Remember where you save. 5. Find .html & open in IE or Firefox or whatever. - Should look like this. 6. Copy & Paste into Admin Console. 7. Voila!