Only when the parents abdicate their duties. If they do, then the village has the choice of administering some control or forfeiting the peace and order of its people.
This law is subject to the same system as any other: If the majority of parents don't want their kids subject to a curfew, they should move to have the law repealed.
How is allowing a 16-year-old to go the late movie or a concert abdicating any kind of parental duty?
The kid is doing nothing wrong and not breaking any laws. The parent knows where the kid is & what he/she is doing. Both parties are fine with the arrangement. No one is being harmed or effected.
Law-abiding people deserve to be left alone.