Making the chests only refill at the corn helps promote more active battles in the center to match the story and movie. People are also making a point with the chests refilling outside of the corn, food was just too common and didn't provide much of any challenge to this. Yes, people will camp, but its just like the movie how the other tributes camped the center. All apart of the game strategy.
Keep in mind, camping and teaming is really not against the rules as it's a strategy played within the game. After making this change I got numerous emails with people stating their opinions about chests that were both for and against this change. So lets talk about chests! What are your opinions?