Deleting menu items

In the code:

/**
 * Implementation of hook_enable().
 */
function admin_enable() {
  $result = db_query("SELECT * FROM {menu_links} WHERE link_path LIKE 'admin%'");
  while ($item = db_fetch_array($result)) {
    _menu_delete_item($item, TRUE);
  }
  menu_rebuild();

  // Weight admin to come after other modules -- in particular, admin_theme().
  db_query("UPDATE {system} SET weight = 1 WHERE name = 'admin' AND type = 'module'");
}

Delete all menu links that begin with admin/*. This is crazy!. If you have added items to the menu such navigation. This module deleted all my admin links without my consent. I think this can not be so without asking.