Yeah I think our older ball python would keep eating every day until he couldn't eat anymore, he's such a piggy, but he's on a strict 7-10 day diet with a small rat. Although the people who had him before us had him on one small mouse every 10 days! He's a pretty large snake, almost 40 inches, a little mouse is like a dog treat xP
I don't think overfeeding is bad, but it just makes the snake reach it's full potential too fast? Like feeding a large breed puppy food that is way too high in protein makes the puppy grow super fast(although that can kill XL breeds of dogs)