I am making the rounds of some of my friends and I want to leave some gifties for them, but doorsteps not being thief-proof, I can't leave nice things for them to find when they get back in game. Mail is nice, of course, but it's limited in several ways, especially if you want to give several different things at once. How neat it would be if I could put stuff through the mail slot in a door for my friend to find! (Yes, they could give me a key, but this is something you could do for people whether they share keys or not.)