Wow... my dad once went down the apartment to the dumpster about 12 years back to search for a tiny plastic handled utility knife I was using to cut up spring chicken. I must have left it in the box when I ditched it.
I was going on about how I would just replace it for him... but he insisted and found it in short order. Said it was right there and a waste to leave it.
Never used that knife on cooked chicken again. He DID remind me occasionally for the next 10 years or so not to throw knives out into the trash.