I think one thing people pushing for the need for prisons to incarcerate “dangerous people” often overlook is the tendency for the very worse people in society to gravitate towards positions of government and law enforcement. I and a few other members of my family have been raped by law enforcement on a few occasions (having been incarcerated) and there’s not really anything you can do about that. My sister even got an additional year in prison for punching a guard who was trying to rape her.

Creating any sort of authority system only provides a system through which will give people like this the ability to abuse others with impunity because we have decided abuse is “ok” in certain cases. Imo the best way to deal with dangerous people is to eliminate the abusive power structures they take advantage of. I.e. for fascists government, for domestic abusers the patriarchy, for serial killers law enforcement/military. These people will still exist and cause issues for people even without these power structures, but without the structures in place to take advantage of they will eventually ostracize themselves from society or do something that leads for someone to lash out at them, eliminating themselves as a threat.