There's only one person in this house who would be inclined to turn random dials. He happens to be the shortest one, who has recently learned to work the lock we placed on the refrigerator when he first became inordinately interested in putting things into it. Things like legos and rocks and dishrags.
Nothing seems to have seriously thawed except the ice cream, which is still pretty mushy three hours later. I don't think we had anything in the refrigerator that would have spoiled in so short a time, but I guess we'll know next time someone wants a glass of milk.