hook_block example confusing

The example for the list op:

  if ($op == 'list') {
    $blocks[0] = array('info' => t('Mymodule block #1 shows ...'),
      'weight' => 0, 'enabled' => 1, 'region' => 'left');
    $blocks[1] = array('info' => t('Mymodule block #2 describes ...'),
      'weight' => 0, 'enabled' => 0, 'region' => 'right');
    return $blocks;
  } 

Seems to imply you should hard-code the enabled and region for each block. Of course doing this means that you can't change it with the admin interface. Confusing for new developers.