why did a 12yo child have unmonitored access to the internet?
Because we’ve made the Internet so accessible and such an integral part of a children’s lives ? Even just for entertainment purposes, I see kids just staring at screens all day everywhere I go. I mean, it’s a silly question no offence.
I understand you can't monitor a child 24/7, but you can be careful with what devices children have access to and what they can and can't do on those devices.
It's also worth remembering that the criticisms of social networks and calls for more monitoring of private communication can be applied to any crime. Do we want Facebook reporting people who it suspects could be committing a "hate-crime" for example? What about drug users, is that Facebook's responsibility too?
At the end of the day parents have to accept some responsibility to protect their own children. Yes, it's hard to do perfectly, but allowing a 12 yo to use social media then meet up with a stranger they met online seems like a total failure on the parent's part here. It's like letting a 5 year old play outside then once the kid gets hit by a car complaining that the cars are the problem because car manufactures care more about selling transportation devices than protecting kids. If you let your children chat to strangers and meet up with people they don't know then bad stuff will likely happen no matter what form of communication they're using.