That is such gobbly gook. If you get a chance, ask her how disarming the good guys makes everyone more safe. What study shows that to be true? The only known evidence we have is what happens when the good guys are disarmed & the bad guys are not. Look at Columbine, look at VT. Good guys disarmed by no gun policy, bad guy ignores no gun policy - what bad guy is going to walk into a store with bad intentions, see the no guns sign, and walk back out?
If Cosco is going to disarm it's shopping victims, then it has a responsibility to place armed guards protecting the helpless sheep within its doors, as well as in the parking lots where people are forced to leave their guns in their cars while they walk with no defense into & out of the store.