Wow! The lack of professionalism is sickening. They pulled a site because the volunteers dared to complain about the lack of fruit received. This non profit deals with dissention by punishing not only the people who volunteer their time, but the many people who regularly contributed to the site (Cactus Park).
You may be a non-profit, but you are still an organization. Treat the volunteers and contributors right. There are many other options for produce, i.e., farmer's markets, Produce on Wheels, Sprouts. Any organization that cuts off its nose to spite its face is doomed for failure.