That little Falcon front spoiler vertical ledge.

[FG Brake]

Hi. This will make a change from all the high tech questions at least.
On the front under flat spoiler of the AU and our new falcon there is a flat vertical tab right across the car.
In my humble opinion I feel this would act like a sail brake and be counter productive in many ways.
It bugged me so bad on the AU I trimmed it off!
But before I do same to the Anniversary I just wanted to know if anyone out there knew of an intelligent reason to leave it there, I won't.