If they try to form a mafia it'll need to be broken up through the most peaceful means available. The earlier you're able to intervene, the more peaceful the means you're able to use. So for instance of someone is having trouble managing their rage and depression, and their community recognizes this in their adolescence, there's a lot that can be done to help them. In our current society, these things generally go unnoticed and when they are noticed, it's treated as an individual failing, and you're more likely to be abandoned than offered empathy and assistance. In my experience, hurt people hurt people.

If a mature mafia forms and is causing a ruckus, we'll need to overwhelm them with numbers and strategy, abolish their mafia, and take measures to prevent them from doing more harm. I believe that this would be rare, however. People aren't generally cruel to each other, and when they are it's often because they've suffered abuse. So it's a virtuous cycle, as we eliminate sources of abuse, abuse becomes rarer. I don't pretend it'll disappear entirely, but all we need to do to form a good society is reduce it to a manageable level and constantly be improving. Perfection is impossible, but it is not required.

What about turning this criticism around? Some people desire to abuse other people and to have power over them. Okay. What does that say about the structure of our current society? If we take this to be true, doesn't that suggest we should reform or abolish institutions that enable people like that? What happens if we take that to it's logical conclusion?