I met a guy at a party last week who makes his daughter phone home after walking one block to her friend's house. And he's in a suburb. The leafy kind! Two parents told me they won't let their kids walk to the mail box. There's too much "opportunity" for them to get snatched. Other parents told me that they'd love to let their kids start going out on their own - at maybe 13, or 14. Until then...When my son was nine he rode his bike to school alone, and many other parents thought I was borderline abusive for this. I recall a story from a few years ago of a teen who rode his bike in all weather to school - a "concerned" parent actually called child protective services in on the parents because the Boy Scout was forced to endure weather!
In they stay. Or they're driven around by their parents.
The fact that a child is literally forty times more likely to die in a car accident than at a stranger's hands makes no difference. Driving is seen as safe. Freedom - once a right of childhood -- is seen as suicidal.