Disable node add pages for content profile node types

It always annoys me that the node add pages for content profile node types still appear in the menu hierarchy.
Here is a snippet that solved this by implementing hook_menu_alter (module's name is 'misc_code'):

/**
 * Implementation of hook_menu_alter
 * @return 
 */
function misc_code_menu_alter(&$items) {
  // disable content profile node add pages
  foreach (content_profile_get_types('names') as $type => $typename) {
    $items['node/add/' . $type]['access callback'] = FALSE;
  }
}

Not sure if content profile should disable these pages by default