I walked into a bar in Thailand that I later came to own. By sheer chance the then owner, who sold the dream to me of owning his bar (nightmare by any other name), well his beloved Thai lady was sitting and eating at said bar.
A massive red ant ran across the bar top and I said "Red ant, you have ants in here?" She was an absolute beauty the owners girlfriend. She put one finger on the large ant to disable it, probably broke it's back. Then smiled, picked it up and put it in her mouth.
Seems the bowl she had in front of her was a bowl of ant eggs.

Maybe they do have some use, in Thailand at least. Not exactly what I would want to eat, but each to their own.