Okay to add to this LiLo, If it was to work then you would need to ditch your original bumper and go for something that's more in your face. Too much attention is brought to the number plate which IMO is not good.
I would advise that you look through past issues of Performance BMW and see if it has been done and how they have gone about doing it. Please put a great deal of thought into it before making your decision
It's all good doing something different to everyone else but sometimes there is a reason WHY certain things are not done often or if at all.
PS If you like it and you feel it's the right decision then do it, just because it's not to my liking DOES NOT mean that it's not the right choice