Just in order to make the code more readable I'd consider moving the logic to a helper method and call it in this condition. Something like:
```php
if( $this->isAccountDisabled( $user ) ) {
// ...
}

// ...
public function isAccountDisabled( User $user ) {
   return !empty( $user->getOption( 'disabled' ) ) || ( 
      defined( 'CLOSED_ACCOUNT_FLAG' ) && 
      $user->getRealName() == CLOSED_ACCOUNT_FLAG 
   );
}
```

Also, I'm not sure if I understand correctly using `CLOSED_ACCOUNT_FLAG` constant. It's declared in `EditAccount` extension which is enabled on community wikia and few others. Is this check needed here? Isn't the `'disabled'` user property enough?