Each person has there own preference, I prefer to blend in, rather than stand out.
As your car becomes identifiable, you draw attention to the cops and hijackers as the car becomes marked and easily identifiable. This is also why I hate personalized plates, and think they are daft. You loose all chance of being anonymous where you go and with smart phones being everywhere its so easy to snap a pic and share to social media...Spacebook, Tweeter, Instadamn etc. Its annoying when you see people sitting on your car and snapping pics like the car is theirs, makes my blood boil.
I think it is a bit over the top. These work if the car is a race car. If on an M3, everyone knows its an M, so the car becomes a bit loud or shouts at you.
i would prefer a full wrap in a different color or matte finish or just wrapping a few bits in the bumper, skirts and maybe rear bumper in black to accentuate a few lines a bit more.