Here's what I did - I got the card and never filled out the paperwork. The card still works. Try it and see - fight the power!
My theory has always been that those cards are a way to charge people on the government nipple (WIC, Food Stamps, etc...) more for their food since I've noticed a many few times when people on welfare in front of me never have 'the card' - just another way to get big mama D.C. to pay more.