I find DPR to be a fascinating case study. Anarcho-libertarians often reject the use of force, except maybe in self-defense, on principle. But use of force is a fundamental interaction between organisms. It's one of the first modes of interactions young children come to understand. It's unrealistic to take it off the table. No matter how "civilized" you are, it's always lurking there as the most basic solution to conflicts. So here you have DPR, this smart, "civilized" guy. But when he's backed into a corner, he lashes out with violence just like any other animal would. In this case he didn't even have any reason to fear for his own life. He lashed out with violence to protect his material interests, just like an animal defending its kill.