Just be careful, and I would have done the same thing if I found goose eggs, or some sort of injured animal that needed my help. Law or no law, compassion for me is a must.
He technically didn't ask for advice, he just merely asked if it was illegal or not to hatch the goose eggs. He was told it is, and he decided to put them in the incubator which he has every right to do. I would have done the same. Just like if I had found another wild animal hurt, law or no law...
Helping and taking in other animals like injured deer can be illegal too but that wouldn't stop me from doing just that, illegal or not I would doctor them. Same with an egg I found I'd incubate it. :P