What could possibly be the issue? If anything, it demonstrates Midwestern values pretty well: Freedom, and a moral, not legal, code that people voluntarily follow to prevent kids from being exposed to potentially-harmful things, without any government needed to enforce it!
If anything, it's more considerate than where I live, where people will openly smoke in front of children, which is arguably more harmful, because smoking has second-hand effects, unlike intravenous drug usage.
I'm not sure what you mean: Do you live in a large Midwestern city, like Chicago, and have different experiences? Do you live in a suburban or rural environment and are surprised to hear it?
Personally I spend lots of time in cities and I'm not surprised. If you don't have experience there, realize that the horror stories fit a long-term political campaign to denigrate cities in 'blue states' (note that you don't hear anything about crime in Miami, Houston, etc.), which are a political power base of a one party.
As someone with kids and living in the Midwest, I just don't even have the words to describe my reaction to this. Wow.