It's refreshing to know some people are at least trying it. However they will all go back to their car after this week. They should try it for life, for an extra challenge.
Usually when I say that I live without a car, people end up telling me how they couldn't do it, how they love their car, that it's nonsense that I don't have one, and eventually circle around to tell me I should get a car. Even those aware of the difficulties of living without a car end up telling me that because of all this... they cant live without one and because they can't do it, apparently I also shouldn't.
I can count on one hand the amount of people that told me that they are trying to reduce their car usage, be more active and use public transit. They are the ones that are getting it and have interesting points of view.
Most people unfortunately just give up and continue to use a car for anything, with their assumptions confirmed.
EDIT: There are very fine examples of this attitude in this thread.