Now you see it, now you don't!
You should expect to get a lot of attention when driving around in a hot car like a BMW i8. On the other hand, getting too much of the wrong sort of attention, such as from the police, is definitely not desirable. Even less desirable is getting attention from the cops when you're about to drag race your high-end Beemer against a Mercedes C3 AMG IPE and a Porsche 911 GT3. Thankfully, we live in the 21st century and technology can be used to solve almost any problem.
Check out how this stealthy BMW i8 makes its license plate magically disappear before tearing down a quarter mile of tarmac.