I'm happy to have found a very sweet message from an old friend! How rude it would have been to (seemingly) ignore it. While Facebook might be right in general

I'm happy to have found a very sweet message from an old friend! How rude it would have been to (seemingly) ignore it. While Facebook might be right in general to hide messages from non-friends, they should certainly have moved that message to my inbox once we became friends (which apparently happened only the day after she sent the message).