One thing that does worry me is if it all went wrong, and law and order fell by the wayside a bit, personal protection from looters and the like would be difficult. Apart from barricading yourself into your own home, there isn't really any way of dealing with it. I believe Lofty Wiseman did a book about urban survival which I'm sure I once had a quick flick through and saw a couple of interesting things like how to convert your house in the event of a catastrophe so tha you could use a normal wood fire in the home. It involves knocking windows out to give you ventilation, and also requires a fire proof floor, and thee were other things in there that showed a bit of thought on the matter.
I am currently reading a book on my PC by Bruce Clayton about life after a nuclear war. Most of the stuff inside is revolving around the aftermath of a nuclear first strike, but could so easily be adapted to a plague or pandemic, drought or any other type of natural disaster. The book is written for american survivalists in mind, and gives another name for them, retreaters. It is quite a good read so far, the book is called Life after Doomsday and is available on Amazon for a tenner.
http://www.amazon.co.uk/gp/offer-li...81511?ie=UTF8&s=gateway&qid=1183743379&sr=8-1