Actually I would always scramble them...it's so much easier than peeling fresh eggs! haha. Ducklings and ducks alike love them. It's a great way to use up excess eggs. I would also try posting eggs for sale on Craigslist....if you have duck eggs, some people are willing to pay over $5 a dozen because they are allergic to chicken eggs.
And actually, ducks rarely if ever egg eat, thankfully.
Now chickens of course are quite opposite...*one reason why I don't like chickens. I have even cracked raw eggs for adult ducks and they eat the shells and have never ever pecked a single one of their own eggs.
Of course, that is my own experience only. But duck eggs are usually so hard and strong-shelled, and a duck's rounded bill is so different than a sharp chicken's beak, I just don't think they could egg eat if they wanted to.