I was cleaning out my fridge the other day and found a Gladware container with over a quart of homemade turkey stock -- that I made last November. I opened it. It looked good. It smelled good. I knew it had been put in the container hot off the stove and kept in the back of the fridge. I figured, "what the heck" and made soup with it -- I was the only person who was going to eat it, and if I gave myself food poisoning, I was the only one who was going to suffer. I'm pleased to report that I've been eating the resulting soup for several days now with nary an ill effect.
Not to say I'm recommending that people eat homemade stock that's been in the fridge for months, but to point out that a lot of food safety recommendations err on the side of extreme caution, which causes a lot of perfectly good food to go to waste. In these days when food shortages are making headlines, maybe we should think more carefully about just tossing out food.