KSDK: “The proposal, known as House Bill 96, which would apply when a person who is authorized to carry a firearm, is prohibited from doing so by a business and is then injured by another person or an animal. If the injured person could otherwise have used a gun for self-defense, they could sue the business, which “assume(s) custodial responsibility for the safety and defense of any person” on their property who could carry.”
House MO.gov: “1. Any business enterprise electing to prohibit the possession of firearms or other arms by the placement of signs as authorized under section 571.107, or other provisions of chapter 571, shall assume custodial responsibility for the safety and defense of an person who is authorized to carry fire arms or other arms under chapter 571 while such person is on the premises of the business enterprise. The provisions of this section shall not apply to private property not used for commercial purposes or private residences of any type. For purposes of this section, “business enterprise” means any business that sells or provides goods or services to the general public.”
Next door Kansas offers something similar to businesses allowing gun owners. So do other states. It provides more protection and the people want it.