I feel like you're trolling by mentioning "haxx0r" and bitcoin, but here goes anyway.
The fact that Renault is trying to sell a tangible, vendor-locked, remote-privileged/DRM-reliant device is more interesting than the "what if some jerk hacks the protocol?"
>Which do you think is going to happen more often: bricked because you couldn't afford your monthly payment, or bricked until you transfer 100 BTC to the haxx0r?
The fact that Renault is trying to sell a tangible, vendor-locked, remote-privileged/DRM-reliant device is more interesting than the "what if some jerk hacks the protocol?"
>Which do you think is going to happen more often: bricked because you couldn't afford your monthly payment, or bricked until you transfer 100 BTC to the haxx0r?
The former and by large a large margin.