It definitely a near top concern. If they're doing a flimsy home spun thing then it's much more likely to be compromised. While the company being able to do this is enough to prevent me from buying a car from them, an insecure system that could be compromised means I believe the company should offer a recall on all cars. Being more secure doesn't mitigate the concerns, but it not being secure hightens them.

To be clear, neither is acceptable but it being secure is still a big issue.