@Montreal Sean -- Re: Poptarts & Hot Pockets: food of the gods.
You're doing it wrong. Go to some religious book place (my preference is a Christian Science reading room). Get some literature and keep it near the door. When the nut cases show up, offer to trade some of their material for some of yours. Works a treat. I've not been bothered after the first time until they find some fresh fish to do the door to door thing. Then they get the same treatment and all is quiet again for a few years.