I enjoyed it when I first read it about five years ago. Lotsa food for thought.
I swear I read a version where he said it was immoral to rely on others (police) to risk their lives defending your own. But, I haven't been able to find it the last couple times I went looking for it. If anybody knows where I can find it on-line, please pass along a link. Until then, I'll just assume I'm misremembering something.