Hey, don't get me started (ooops ... too late! ;^) You say it tongue in cheek, but as far as I'm concerned, it IS child abuse. I had a friend (we've not surprisingly grown apart over the years) who insisted on remaining a vegan while pregnant; her doctor dumped her and said he wouldn't be responsible. Found a new doc who said she'd have to add hydrogenated vegetable protein to her diet (horrible faux-meat chips that chew like old shoe leather and taste worse). She was weak and drained her entire pregnancy, and the baby was born very small and at a year old, was STILL not doing things other one-year-olds do, like holding eye contact, making facial recognition, pointing, laughing, seeking independence ... instead, this baby clung to her like a little monkey, and his eyes had the dullness of an infant's eyes.
I thought the kid was possibly retarded, but after a few years it was plain he was normal in intelligence, but physically he was very, very small, and prone to allergies. THEN, as he got older, his stupid vegan (but I repeat myself) mother, whose doctor had said that the baby MUST break the vegan diet and have dairy and eggs while very young, started cutting out the dairy and eggs and made his diet more and more strictly vegan. The last time I saw the kid he was maybe six or seven, and -- as ALWAYS, every time I ever saw him -- he had dark gray circles under his eyes.
Yes, it is child abuse, plain and simple, of the worst kind -- imposing your own adolescent political agenda on an innocent child. Make no mistake, veganism is a political agenda.