it depends who are your friends on fb
I post my kid photos all the time, but I actually have two lists of people, friends vs acquaintences. Friends are mostly family members, acquaintences are my professional work colleagues, friends from high school/college, they are not actually on my friends list. Not only are my kids posted, but my nephews and nieces, and that's fine because they go nowhere except for my very small inner circle. my entire list of friends and acquaintences are about 100 folks, friends list is maybe 30?
all depends how you use it, you can restrict the hell out of it, and all of my acquaintances find out when they "friend me". Sometimes we do this over group chat, but that is most often reserved for texting rather than sharing media, since that doesnt work so well.