I've been eating slightly spoiled food because I'm too averse to throwing food away.
Please know that there are a number of microorganisms that live in 'past-its-prime' food that secrete poisons that are very dangerous to ingest. For instance, many (most? all?) molds have microscopic 'tendrils' that they sink deep into whatever they are growing on, with those tendrils secreting poisonous substances into the food, and so simply scraping the visible mold off the surface of something does not make it safe to eat.
If the concern is for cost, consider the costs involved in going to an ER, being in intensive care, (or not surviving). If the concern originates with the horrendous (but common) fear-mongering of parents who said things like, "there are starving children in [Africa/India/elsewhere], you'll eat what we have here", then ask yourself: if you were inviting one of those starving people to your house, would you feed them what you've already called "slightly spoiled" food? Or would you feed them healthy food? Don't you deserve the same consideration as you would give them? [Rhetorical.]