Revolting, eh? That's saying something coming from somebody who can eat a soggy train station sandwich...If a parent wants to let their child die of a curable disease then who are we to tell them otherwise?
Parents make them and, until the age of 18, they should be allowed to do exactly what they like to them. Just like that bloke in the other thread who ran out of snacks and thought he'd try some delicious toddler eyes. He made the eyes, he can eat the eyes.
I'd probably just send mine out cleaning chimneys if i had any children, though. I had a sheep's eye once. Revolting it was.