The claim is people have wild perceptions influenced by dramatic media coverage, and the world is just as safe as, or safer than, it ever was.
But, I'm not so sure. I think the reality has changed too.
Since the days when we used to walk five miles to the toy store, everyone has better access to technology, transportation, and information, than they did, and this is a double edged sword that enables both good and bad people to have more capabilities.
Also not just perception is the fact that Reagan defunded mental health treatment, leading to the massive homeless situation we have (I'm not saying homeless people or mentally ill people are necessarily dangerous, but as with any unknown variable, their presence does make it harder to determine when a place is safe or not).
Still, in this particular case it seems like the police went way over a line of reasonableness... maybe not in picking the kids up, but in what happened next.