Once you let the dysfunction set and fester it is pointless to "blame the parents" or shame. Either the parents were raised just like are raising their kids or problem kids are in an environment that allows them to maximize their fukkery. Only way you can clean it up is by harsh sentences, removing problem kids from the community in their first wave of criminality and not after they do something serious. Not going to even begin to talk about revoking gov assistance because you keep having kids that get into fukkery.Always starts at home, always.
But you right in the fact that I don't know how you can force the parents to do better and make better decisions.
Shaming mufukkaz might be a good start.
The neighborhoods are terrorized by a small amount of psychopaths and are held down by an overall level of dysfunction sustained by gov assistance that sustains bad birthing/parenting practices. Blame and shame is not going to work on people willing to shoot up crowds of people for one person, or parents that live off of gov assistance and the latest in their family to do so.