Again, the power resides in consensus. Temporarily getting away with shooting someone over a road rage incident does not change the consensus that road rage shootings should be punished. Road rage shootings will never be legal because consensus doesn't want road rage shootings. They do not in fact have the power to change the reality that they will be sought after and punished if caught.
The ones who defy unjust laws have consensus on their side, and the community will do what it can to mitigate their punishment - hence underground railroads etc.