Back in my day, when you were caught playing "doctor" you either got a talking to or ass whipping, sometimes both from your parents but calling the law was never even thought about.
When I was a kid no one called the cops, especially for crap like this. If we had, the cops would have arrested the caller for being stupid without a permit.
The neighbor would have simply told my parents of my wrongdoing, and my parents would have handled it.