exclude specific users and roles (eg admin) from public User List

a bit of jQuery can hide specific usernames without hacking the module:

<script>$("div.user_list a:contains('admin1'), div.user_list a:contains('Applicator2'), div.user_list a:contains('Consumer'), div.user_list a:contains('rgoya'), div.user_list a:contains('testprofile')").hide()</script>

add to the theme page.tpl.php file