4 WAY FLASHERS IN REVERSE

I OWN A 2011 FORD EDGE. I PLAN ON ORDERING A 2015, BUT HAVE A GREAT SAFETY SUGGESTION, I WOULD LIKE TO SEE ON IT.
WHEN I PUT MY CARS IN REVERSE, I ALWAYS PUT ON MY 4 WAY FLASHERS TO ALERT VEHICLES AND PEDESTRIANS, I'M BACKING UP OR PULLING OUT OF A PARKING SPACE. RECENTLY WHEN BACKING OUT OF A PARKING SPACE, SOMEONE ASKED ME IF MY EDGE CAME THAT WAY. I SAID NO BUT HE SAID YOU SHOULD SEND SUGGESTION TO FORD; I KNEW I HAD A GREAT IDEA AND IT SHOULDN'T BE HARD TO ADD.