Enable one-click unsubscribe from email

In the notification email that is sent to subscribers of an idea, it has an unsubscribe link in the footer.  This link just takes the user to the idea page where they then have to find and click the unsubscibe link there.  If they are not logged in they have to log in first before they can unsubscribe.

It would be great if the link in the email was a single click unsubscribe that removed that user from the notification list without them having to either log in or click anything else once they load the page.

We are seeing numerous users who are frustrated at the notifications coming through for a popular (heavily commented) idea and the current path to unsubscribe is too cumbersome.