Giving full, unattended access to the internet to a 9 year old? Absolutely nothing. Parents should get a noble prize equivalent for solving "spend more time with your kid" problem.
I didn't say it was Apple's fault, and it's not the parents' fault either. Sometimes kids playing on the street get run over by a car. It's very unfortunate, but no protection is 100% effective. Closeted kids of overprotective parents that never leave them out of sight usually have much worse outcomes than others.
From my personal experience - my parents didn't try to limit or control my online behavior and usage of a computer at all normally, which got me into few weird situations but also allowed me to learn how to recognize and deal with them. When they tried restrictions as a punishment, they never succeeded in any way. At one point when I was around 12-13 years old I simply bought an older laptop they didn't know about.
Today's smartphones are much cheaper, more powerful and widely available - practically every older classmate has one in a drawer somewhere and will happily sell for a few bucks. Let kids learn how to behave online while unattended, because they will be online unattended.