It is the same as the buffalo. Grandparents were going over the first of two fences to take their grandkids close to feed the buffalo that used to be penned in areas around town. The buffalo who had recently given birth were dangerously protective. They are wild animals. They are not domestic pets with personalities who like people.
The developer removed the buffalo and there was thread after thread on here with all kinds of criticism of the developer.
Things have not changed. Human children are not born ready to fend for themselves. It is a long and challenging job getting them to that point. If kids are not accompanied by adults here, it leaves the rest of us to feel we have to watch out for those kids and that isn't our job anymore. It is one of the reasons I moved here so I don't have to worry about kids and watch them unattended do dangerous things.
I love children, I love to be around them, but I don't want to have to worry about them.
So if we wrote The Sun, what would we say? I'd say that children need always to be accompanied by adults, but the squares are public areas. And even if they are with adults, the adults sometimes have less sense than the kids.