Why sorting members by "last login" instead of alphabetically based on a profile's field?

Issue Summary

I have been installing and setting up drupal during some years and one of the first modules I add to my projects is yours.

Profile is great and I thanks you all for it's development, but I have a little critic for you. ;-)

A very common petition (at least, from my experience) is sorting the users by "Surname, Name" so I normally create a couple of profile's fields to stand this information that is not included in drupal by default and then I apply my patch to your sql queries to extract users in the new order.

And it drive us to the title of this feature request: Why sorting members by "last login" instead of alphabetically based on a profile's field?

I can post the patch if you accept the suggestion, but the implementation isn't mine... I took it from here: http://drupal.org/node/59338

Thanks a lot for the great work done.