Heh, very nice solution))
But I actually went a bit dipper, and coded a redirect into system template: any 403 will go to login page.
I figured there might be other pages with the same problem so this solves them all. ))
In case anyone interested, here is the code:
$user = JFactory::getUser();
if ($this->error->getCode() == '403' && $user->guest) {
header('Location:index.php?option=com_comprofiler&view=login'); die();
}
This is going to the Community builder login page, but can be changed to whatever...