You see those headlines because it makes for a good read.  thje increase in violence recently is a product of our economic recession.  You don't see many headlines if any about domestic violence.  Here's one more factor, the classes being spoken of that the court requires often see rates of recidivism.  This means that the men reoffend. 

You cannot fix everyone.  The majority of kids are taught that violence is not a way to solve their problems.  I'm assuming you haven't spent a week in your child's school before. I did it as a project, but ended up learning more than I knew before.  Schools for their part do a lot to teach kids how to solve problems without violence.  

Some kids are more violent than others and you'll notice the kids who were violent in school, despite everyone's best efforts they tended to continue to be violent into adulthood.  A class cannot fix someone and make them a non violent person.  The nature of some is to respond violently.but I understand your viewpoint