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/**  REMOVE PERSONAL OPTIONS FROM PROFILE PAGE **/
<?
    // removes the `profile.php` admin color scheme options
remove_action( 'admin_color_scheme_picker', 'admin_color_scheme_picker' );

if ( ! function_exists( 'rdm_remove_personal_options' ) ) {

    // removes the leftover 'Visual Editor', 'Keyboard Shortcuts' and 'Toolbar' options.
  function rdm_remove_personal_options( $subject ) {
    $subject = preg_replace( '#<h3>Personal Options</h3>.+?/table>#s', '', $subject, 1 );
    return $subject;
  }

  function rdm_profile_subject_start() {
    ob_start( 'rdm_remove_personal_options' );
  }

  function rdm_profile_subject_end() {
    ob_end_flush();
  }
}
add_action( 'admin_head-profile.php', 'rdm_profile_subject_start' );
add_action( 'admin_footer-profile.php', 'rdm_profile_subject_end' );

class RDM_User_Caps {

    // add some filters
  function RDM_User_Caps(){
    add_filter( 'editable_roles', array(&$this, 'editable_roles'));
    add_filter( 'map_meta_cap', array(&$this, 'map_meta_cap'),10,4);
  }

    // remove 'Administrator' from the list of roles if the current user is not an admin
  function editable_roles( $roles ){
    if( isset( $roles['administrator'] ) && !current_user_can('administrator') ){
      unset( $roles['administrator']);
    }
    return $roles;
  }

    // don't allow users to edit or delete unless they are an admin
  function map_meta_cap( $caps, $cap, $user_id, $args ){

    switch( $cap ){
        case 'edit_user':
        case 'remove_user':
        case 'promote_user':
            if( isset($args[0]) && $args[0] == $user_id )
                break;
            elseif( !isset($args[0]) )
                $caps[] = 'do_not_allow';
            $other = new WP_User( absint($args[0]) );
            if( $other->has_cap( 'administrator' ) ){
                if(!current_user_can('administrator')){
                    $caps[] = 'do_not_allow';
                }
            }
            break;
        case 'delete_user':
        case 'delete_users':
            if( !isset($args[0]) )
                break;
            $other = new WP_User( absint($args[0]) );
            if( $other->has_cap( 'administrator' ) ){
                if(!current_user_can('administrator')){
                    $caps[] = 'do_not_allow';
                }
            }
            break;
        default:
            break;
    }
    return $caps;
  }

}

$rdm_user_caps = new RDM_User_Caps();