What gripes me too is when fellow CCWers test store policies anyway by not concealing properly or open carrying in these stores. The rule of thumb should be "don't ask, don't tell" and don't tempt them to test their policies out on you.
Good point. If no one knows its there, there would never be an issue.
BTW, is it even legal for these companies to ban you for legally carrying? What about cops? Off duty cops? Security guards? I think there is something legally not quite kosher with a policy such as this.