I would agree that food is the least important physiologically, at least. Psychologically, in terms of an individual's comfort level, food is pretty important.At least, I don't believe I have ever found a victim who did not accept food gratefully, no matter what length of time they had been out. There is probably a social aspect as well - "the breaking of bread together" thing.

It is most important to emphasize that one needs the knowledge, as well as the gadgets - good point.