This sign is hanging in a tiny, sandwich/deli shop in our neighborhood. We get coffee and lunch there sometimes, but we tend not to buy any groceries there--they're significantly more than the deli down the street.
But we started thinking about the sign, and how, with the recession, we're trying to make extra effort to support businesses whose practices we respect. (We don't want anyone to go out of business, and then regret that we should have shopped there more often.)
Have you seen these signs before? Do they influence you?