I suspect this has a lot to do with it. Kids and pets in a rural setting are not going to be confined by a yard fence, and unless you live right on the highway you don't have to be as careful of cars. It sounds as though this area is slowly being enveloped by the city. The urbanization is likely moving faster than the culture. I find it sad when the family country estate gets swallowed up by urban sprawl, but it happens."This neighborhood has been here for 45 years," Franklin said. "All of this growth has happened around us and we are still a little bit of the country.
Having said that, there is NO excuse for doing 70 in a 30 in a residential area. There has never in the history of the world been a parent who has never had their child get away form them for a moment. You should stay attentive and try to minimize that as much as possible. Good parents do. But good parents still find that their offspring occasionally gets into something they shouldn't.
And if some jackwad kills a kid doing 70 in a 30, then of course those parents don't have the legal right to kill him. But don't expect me to lose a lot of sleep if they do, or to vote for the police chief who does next election.