Here’s a non-paywalled link to an article published in the Washington Post a few days ago. It’s great to see this kind of thing getting some mainstream attention. Young children have not made an informed decision about whether they want their photos posted online.
Here in Belgium it’s been pretty much the norm, both in friends groups or in institutions like schools that ask more formally, that one does not post photos online without the consent of all participants, including that of kids and their guardians. This is particularly the case for sharing publicly e.g Facebook post but also WhatsApp group.
It’s a mess but habits are changing at scale.