I would roam the streets too around age 6-7.. i grew up coastal town and my mum told me goto this girls house after school so I didn't I just sat on the ferry for 3 hours my mum cut my tyres on my bike !
I think age 12 is norm now. Isn't that when your in high school anyway? I think issue is raising self awareness and educating what's right/wrong around you. Not letting kids live in a fear bubble. Otherwise kids aren't going to even want to goto the shops