Let's be fair though, kids ran into that stuff all the time in the past and they turned out mostly fine. I don't see this as big of s problem as the people that get outraged make it sound.
The problem/fear isn't that kids run into this stuff, it's the media/lawyers blowing it out of proportion and negatively affecting the share value of Big Important Companies.
^ hah. that is a genuine problem
But on a serious note, mature services like youtube/instagram can do it - they know more about me than anyone else. How hard would it to be to filter by age!