Don't. They're already going full out.
You want to hold someone's feet to the fire? Try Dayton-Hudson. They own Target and other stores. IIRC, they haven't done *anything*, while Walmart trucks carrying supplies, food, water, and clothing are rumbling into Louisiana, MS, AL, FL, and the relief centers in Texas.
K-Mart/Sears? Zip.
Walmart didn't even need to be asked, so knock off the Walmart bashing for a while.