If the kids still stayed out past curfew, were causing problems and getting in trouble, that would be when the police and law should get involved. If the kids were behaving and not doing anything wrong the police and courts should stay out of it. Back in that time that was very important, buy today protection of the community is more important. That's something we can never be sure enough about. If I wanted to keep my house and yard as dirty as I wanted, that's my personal right.
Most businesses allow smoke breaks and a person can step outside a school building to smoke.
This benefits the common good, but still allows for the rights of the individual. For example, our government is justified in regulating curfew ordinances, prohibiting gangs, mandatory insurance, gun control, and censorship of pornography. The government decides many things that we, as people, don't think is right. In a couple of years, firearm fatalities are expected to surpass auto deaths. We are already seeing this fact come true.