With regard to delivery men, trainers state that the delivery will either return or drop the package off at a neighbor's home, so it is not necessary to open the door to them. They also receive a small reminder card of these steps to keep by the phone at home. Before trying any of the recipes at home, they are told to check first with you for permission. Students are instructed to ask permission before using knives or any kitchen appliances. Please instruct them thoroughly on what they can and cannot do.
Kids often assume things are okay to do unless instructed otherwise.