It was the giveaway that had fast food fans lining up for free chicken. But KFC's Oprah-driven promotion got so huge the company had to pull back its offer and ask customers to get raincheck vouchers they could redeem at another time. Now two California residents say that's not good enough. They've filed a lawsuit against Kentucky Fried Chicken and its parent company, saying KFC used false advertising to lure in customers. The pair believe the chicken giant should have done more to accomodate the crowds of fans who showed up to redeem the printable coupons. Both are asking to get back the money they spent trying to get the free chicken.