No car inspection here in Florida, and when I lived in NJ, it wasn't something they'd check. I think it's more of a CYA for BMW. Any inspector would have to know the placement of the placard on every car they see.....which would be tough to do.
The PO peeled the warning off the aluminum trim above my glove box....and the stupid thing had actually etched itself into the aluminum. You can still see the ghost image. I may look to pick up a new one from the dealer, as it kind of bugs me.