My wife and I were out dining this last weekend at a restaurant that has fabulous cole-slaw. I had finished all of my entrée and had a couple of bites of slaw left when I found a used band-aid (bandage) in my slaw. I stopped the waitress when she went by and explained what I had found. She brought the manager over and they kindly offered to give me something else, but I was almost done so I wasn't hungry. They did comp the meals. I guess I'm the opposite kind of customer. I didn't make a big deal of it (or sue).
BTW - we left a tip, too.