David's argument is basically that a survivalist with a gun won't shoot you because you can grow more food for them i.e. you're more valuable alive. I'm not convinced that people are that rational, if gun forums are any guide

I'm not sure who brought up the moral issue of deserting one's society, but it's something I still chew over. On one hand, by growing one's own food and otherwise becoming more self-sufficient, one reduces one's own reliance on that society, so it is actually less burdened by your presence. On the other hand, self-sufficiency implies weakened ties with the rest of society, which may conflict with obligations to the society that one was born / lives in. The fact that we are discussing "end of society" scenarios in the first place suggests that we are less wedded to the idea of society in its current form.
But there is a difference between abandoning society per se and wanting a different form of society. Unless you can become totally self-sufficient, you will rely to some extent on some other people, and it can be argued that you have obligations to them in return. However, just because you have obligations to a society doesn't mean you are obliged to support society as you find it. A few of my more gardenish friends have, by sheer coincidence, moved into walking distance from my house, and we swap plants and produce occasionally. This is also a society, and one that I am comfortable being obligated to.
Wombat, I live in Brisbane. Actually, I'm one of those people that make rude comments about people who live in Sydney, so I see I shall have to take some of them back!

I'm also a law student and work in a small law firm part-time. I get to see a lot of people with whom I would not want to form a society (mostly lawyers, they all seem to be obsessed with status and stuff

