For flashing headlights, the highway code is so far out of alignment with the real world that it would be more pragmatic to change the highway code to accommoda

For flashing headlights, the highway code is so far out of alignment with the real world that it would be more pragmatic to change the highway code to accommodate it and properly define liability. Being predictable is the most important thing for safety and you can't be predictable while treating all flashing headlights as a warning.