I don't know if it counts as hoarding, but my great grandfather fought for Germany on the Western Front in WWI and then lived through WWII in southern Germany. In 1950 my grandparents were able to get him to NY where he lived with them until he died. When he died they cleaned out his room (which he kept very tidy) and found food hidden in various places -- cans underneath clothes in dressers and behind books on shelves, Hershey bars under the mattress, etc. I guess he had lived through some stuff and wasn't going to be caught out ever again.