[patmcc]

>>>What I DO have concerns about, however, is overzealous adults who see a kid playing alone at a park and decide to call the police or child protective services.

Ding ding ding! This is exactly it. I'm not worried about my 6-year-old walking around the neighbourhood alone, or staying in the car (in proper weather) while I do an errand, or going into a store and grabbing something. I'm not worried about kidnapping and murder and all that stuff, since it's so vanishingly rare that it's worth worrying about as much as lightning.

What I am worried about is some busybody calling CPS because they think kids are stolen and sold if they're left unsupervised for 5 minutes.