Facebook: Half-hearted email replies

For a couple of weeks now, Facebook allows you to reply to a notification (e.g. when someone comments on your status) via email.

Xxx Xxxxxx commented on your status:

"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras neque diam, tincidunt sit amet faucibus quis, tincidunt eu mauris. Nulla vitae est ipsum. Lorem ipsum dolor sit amet, consectetur adipiscing elit. "

New Feature: Reply to this email to comment on this status.

To see the comment thread, follow the link below:
http://www.facebook.com/xxxxxxxxxxxxxxx

Thanks,
The Facebook Team

So just hit reply on this e-mail and type away your response.

A really nice feature, since most of the time I read the comment first via email, not on Facebook itself - no matter if mobile, iPod or Web. So being able to reply right from my mail-client is really convenient.

However, the one notification one cannot reply to via email, is a notification from a facebook message itself. If someone sends you a message on facebook, you have to log on to facebook and reply their.
Odd.
Half-hearted.
Please...