alt Hacker NewsI don't really understand your point in restating this. Someone who says "X should be true" isn't going to be convinced that X should be false by reminding them that X is in fact false.
>GPS et al would be non-functional if everybody could make a jammer.
Then it should be illegal to make a GPS jammer. Making it illegal to reprogram a GPS receiver in any way is unnecessarily broad.
GPS is a bad example, but there are things that pose a physical threat to others that we maybe shouldn't tinker with. Like I think some modern cars are fly-by-wire, so you could stick the accelerator open and disable the breaks and steering. If it's also push-to-start, that's probably not physically connected to the ignition either.
It would be difficult to catch in an inspection if you could reprogram the OEM parts.
I don't care about closed-course cars, though. Do whatever you want to your track/drag car, but cars on the highway should probably have stock software for functional parts.