All the more reason in my mind. Undelivered packages will sit in the truck, outside, overnight, without heat. I'd rather it sit on my door step for an hour or two before I notice it, I mean you're expecting it so you'll see it eventually.

I have a little sign on my door that asks all Couriers and Post packages to be left in the shade behind the side gate. I've received 5 or 6 packages in the last few months, and they've all followed my little note. :)