Spend time with them, so they know that you are there for them. I don't think that there is a whole lot that the government can do. I think a lot of it the kids have to deal with themselves. I've been taught my whole life. We can help to decrease the violence by adults being more mindful.
Little kids look up to their parents.
Even if you are violent to the mutt in the neighborhood - little kids look to you. Violence is violence. Adults always must be a positive example. It's the parents, it's all at home. Explain what I did that day.