Please make the flashing headlights optional with sentry mode, it attracts too much attention. I see people coming to my car after they see the headlights flashing.
We drive the smartest cars on the planet. Let's help out our fellow owners who forget to turn off their turn signal and never change lanes. This could be added to the senior citizen option ideas. Increasing size of flashing arrow with increasing volume over time.
When hazards are active, it would be a interresting safety feature to have the hazards be disabled at least temporarily when signal light is engaged. Without that, other drivers cannot tell that the signal light is on as both are flashing.