I'm just following the theme of violence, and I'm thinking of the kind of society that would exist--where everybody has to raise their own food, and stealing food would threaten your life. But you would try to stop me. That dispute resolution organization would have to use violence to return whatever I took. And stopping me would be a form of violence. What if I believed that everything belongs to everybody, that you have no right to stop me? Then you would be using violence to satisfy your own sense of justice.
I'd want to shoot you because you're stealing my food? Speak for yourself. Would you really shoot someone for stealing some vegetables from your garden? Dang, maybe it's good we have police instead... just kidding. Anyways, of course I wouldn't shoot you for stealing from me. I'd ask you to give the food back. I'd tell you I consider it theft. I'll tell you that if you try to do it again I'm going to stop you. I would let everyone else in the community know what you did. And of course I could always go to my dispute resolution organization, which of course I would if what you stole was of significant value and you refused to recompensate me a way I found acceptable.
How big is this group of people that you're going to wipe out humans with? A democratic majority? Anyways, I don't think I have to worry about mass numbers of people wiping out all humans in a stateless society. If I did they would wipe us out in our current society.
And just as a side note, that organization would probably be unable to exist without the use of violence to prevent it from being toppled.