I don't think this works because even if a transaction is irreversible, the court could still impose monetary damages, if it has jurisdiction. Or some other pen

I don't think this works because even if a transaction is irreversible, the court could still impose monetary damages, if it has jurisdiction. Or some other penalty. And it seems hard to keep US machines (or any other country) out of a permissionless distributed algorithm? Effectively, any country could claim jurisdiction pretty easily, if it wanted, by adding a machine to the network.