We already have some of these issues without open source. People today modify their cars to make them perform better at the expense of violating emissions stand

We already have some of these issues without open source. People today modify their cars to make them perform better at the expense of violating emissions standards. It's a very tiny number of people that actually end up doing so, and they sometimes get caught and are then fined appropriately for emissions violations. My feeling is that if there are regulations that require certain ethical behavior for self-driving cars, then there will also be periodic testing to make sure your car is in compliance. In the case of aggressive driving, we might also start to see traffic cameras doing automated detection of violations – if it sees that the gap between cars is less than 15 feet it'll take a picture of your license plate and send you a ticket (or even suspend your license until you can prove your car's software is in compliance). But I suspect that on the whole people are going to stick with the defaults. The same sort of people who like to jailbreak their phones might mess with the software on their cars, but it will be an even smaller percentage of the population that engages in this behavior – after all, if you mess up you may not just brick your car, you might get yourself killed.