Honestly it depends on the situation and saddly the common sense of everyone.

I grew up in the 70s and 80s, and in the neighboring town a child went missing.

Pre internet there was still a lot of worry. We got talked to by my parents who were too busy to change their day to day. Being kids we weren't very concerned (I don't think we thought it could happen to us)

It was a rural/suburban type area (my high-school walk home from the bus was 1 mile). I was given free range, and did a lot of exploring of trails and things unsupervised with my brother and friends. It was probably too far in the other direction with lax supervision. We never ran into big trouble, but cellphoneless us last century, we had to be hard to track. But that was the way things were. Playground games were rough too (I had a dislocated elbow that says maybe too rough sometimes..) but we got through.