How transparent can they be? In my country, you can in fact drive someone over if they are threatening your life and it's the only way to escape the situation.

How transparent can they be? In my country, you can in fact drive someone over if they are threatening your life and it's the only way to escape the situation. It would be self-defense. I had the understanding that it was the same in America -- anything you can take to hand can be used to defend yourself assuming you are actually in danger. So the very rare situation where it might well be justifiable was already legally excepted. So what's even the point? Stand your ground in traffic? Some sort of signalling to change social norms and get people used to this sort of political violence by vehicle? Signalling to their base? Just work to make themselves look busy while effectively legalizing murder by car?