I think whilst kids are out as much as they ever were...
In the 70s and 80s, everyone knew who you were, who your parents were and you respected or feared other adults as much as you did your parents.
My parents didn't socialise massively with other families in our village, but they were at parents days, they were at village fetes, they spoke with their immediate neighbours... sufficiently that whilst I may not know an adult, they DEFINITELY knew who my Mum and Dad were and could pass on a message 'I saw Widdlin' doing something awful' or tell me off there and then.
And if Mrs Smith told me off for something and I went home and told my Mum... she would back Mrs Smith up, and I'd probably have to apologise to her for whatever it was AND get a punishment at home too.
My Mum would usually know what it was I'd done, where and to whom BEFORE I got home!
I don't think that happens any more. Kids are often pretty anonymous. Parents are not contacted when their kid is spotted doing something vile and if they find out someone saw their kid doing something awful, they deny, disbelieve, have a go at the messenger. If someone dares tell their kid off they're more likely to have a go at the other adult, not their child.
I am not saying that system was perfect - it absolutely wasn't. But it was different.
I also think adults are frightened of kids now - a kid might stab you, that would NOT have happened 40 years ago, not to the extent you'd actually suspect it could happen.
A kid could make a complaint about you that would be investigated to your detriment even if it is untrue -and kids know that.
Again thats not to say that kids being disbelieved as standard when making allegations against adults was ok, it wasn't... but the downside of 'believe the child' does also exist.
So where a child might have been collared by an adult and physically taken to their home and handed to their parent... that isn't going to happen now.