When the cars you sell are stolen so much more than other similar cars that they have caused a large rise in the theft rate and insurance companies stop issuing

When the cars you sell are stolen so much more than other similar cars that they have caused a large rise in the theft rate and insurance companies stop issuing policies that cover theft of your car but still issue policies for those others, and you know that thieves are targeting your cars because you have decided to not include a simple anti-theft device that those other cars do include, then you are negligent, which means you should bear some of the responsibility for the predictable consequences of your negligence. Thieves exist. Car makers need to be aware of that and design accordingly. By 2015 every car maker selling in the US except Kia and Hyundai was putting immobilizers in almost all of their new cars. The benefits of immobilizers were well known, with car theft rates declining dramatically in jurisdictions that mandated them.