I don't mind eating "out of date" food provided that it still looks edible. Green mouldy bread doesn't come into that category. Pencillin I don't mind when it's wanted but eating it in the raw state doesn't shake my bag at all.
I wonder how the "date ruled foodies" would go on with some of the old fashioed game which was hung until it started producing maggots and, in the case of game birds (not hot young ladies from the local boozer) until the tail feathers fell out.
Fresh unprocessed meat is, in the main, safe to cook and eat after keeping for a few weeks; in the right conditions of course. Once you start adding preservatives and other "fillers", like water in bacon, then the keeping properties suffer. Pork and Chicken I would always be careful about keeping for any extended period.