I am a big believer in everything in moderation. Having gone through the Y2K scare ....where everything from banks to water supply was predicted to have issues with the changing of the century. I watched friends and neighbors stock pile everything from bottled water to guns and ammo!
It always a good idea to not run your household with out a cushion, I'm not going to be going out purchasing any quantity of food supplies as they do have a shelf life.
I too try to grow some of my food supplies but will problably only increase a small amount of what I grow.