Maybe it hasn't hit Australia yet (lucky you, if so), but there are more than a few weirdos out there that stalk people they've seen online. If the person with the image has posted elsewhere, it doesn't take that long for someone in Mom's basement to use an image search to find more images and possibly then identify them, and then move on to online harassment. Get a life, but I guess this is their life.
As stated earlier I apologise if I came across as harsh.
I recall as an adolescent child, seeing a strange adult lying in the grass adjacent to a school sports field, watching the kids play through a telephoto lens. It felt and looked suspicious. I was in a car with my family stopped at a red light.
A true paedophile will unfortunately access children and pictures of children without resorting to obtaining innocent pictures from the Internet.
I do understand about protecting one's or a child's identity online.
I have seen some photos of chickens on social media and I think it is really nice when people feature their children with the chickens. I appreciate the innocence of it and it is good to see children learning about and caring for animals, which is a good thing in the world.
I personally am not comfortable featuring myself or people related to me in my chicken pictures, but I respect others who do.
However I feel that by deliberately censoring one's face with any kind of emoji image or a scribble etc., it just draws attention to the person. That in itself can compel some crazy person on the Internet to stalk and harass that person, or people related to the person. They can get carried away at trying to unveil the identity of the censored faces, and eventually with enough stalking will track them down. Then who knows what could happen.
If the identity of the parent of a censored child is shown in the photo, then by proxy the child is identified anyway. It's all in vain.
There are also methods unknown to me where if an image has been censored by a digital filter or an emoji, then said layered image can be removed with photo editing software, therefore revealing the identity of the person. It is easier to just not show the person's face at all in a picture that is posted on the Internet.