> it should be a civil offense to frivolously report child endangerment based only on the fact that children are unsupervised.
So when I see children alone and think they might be lost, what do I do? Trust the runaways who tell me that all is good? Creepily follow them until they reach their destination? What you call "frivolous reporting" in one area would be "criminal neglect" in another.
That's the whole idea of child protection services: Give them slightly more power to investigate than an ordinary citizen, so they can make an informed decision according to the law. After all, the reporting is not the problem, lack of standards/consensus what good parenting means en detail is.
> not everyone on the enforcement side will get the message
Lack of ongoing training in law enforcement should, IMHO, never be a reason not to change things for the better.