Good for those who can not control themselves, specially when they are drunk.. :)
This is to avoid any embarrassment that caused by people sending the mails when they are half awake.
Simple but elegant product.
Google!! you forgot one thing, If i have enable this feature i can still send mail via my mobile without any such obstruction..(mobile version of Gmail OR Gmail configured outlook)..
Gmail does not have clear line draw between the mail server and mail client... cus both are at the same end.