Arf I agree, it's an interesting case. Fancy having a situation like they apparently do in France, where sharing a photograph of anybody without their express consent, including your own children, can lead to fines of 45K 
How on earth could that be practically enforced? I suppose in the vast majority of cases it doesn't need to be, since a tacit understanding exists if you go to a birthday party etc. that you might be in a photograph or two, but it is surprising they come down so hard on people.
It's different in the case of children though, who haven't entered into that tacit agreement, much less an explicit one. I suppose the logical conclusion is to ban any photos of minors on social media, but really, would any adult really object to a cute photo of them in a beanie hat in the snow aged 5? Sad that parents can't just use their common sense and stick to those kind of things, and avoid the potty pictures on the high chance their child won't be thrilled about it when they're older.