And once again we find the massive flaw in security by obscurity and to a lesser extent why the invisible hand of the market will solve all problems is bullshit.
TikTok, and Instagram didn't create the vehicles that were so easy to steal. Kia and Hyundai did by saving ~$20 by not including the immobilizer in the US while it was standard in the same models in other markets, where it has been required by law for decades.
So there are two groups at fault, Kia and Hyundai USA for nickle and diming their customers on equipment that was standard elsewhere and those less regulations is always good evangelists in the USA as the hand of the market, without the regulation standard in the rest of the west is the cause of this spate of easy to steal cars.
All TikTok, and Instagram did was allow information to be widely known.