With the obesity epidemic it is probably better to tell people they can just compost their food if there is too much and they can't eat it. And then cook a little less next time.
I keep 100% of foodstuff out of my trash, and an added benefit is that you never get stinky trash that needs to be taken out. I take my trash out every 2 weeks and it never smells at all.
My parents regularly throw out spare food (bread, meat, fruit) onto their lawn, local wildlife (birds, foxes, hedgehogs) always take it all within 24h.
I seperate my compostables as well. I don't even use a trash bag in my bin anymore. My trash bin fill up so slowly that I go months without taking it to the street.