And you can bypass a seatbelt warning by just plugging in a buckle without the belt, but most people don't bother. It's not worth the inconvenience to circumvent, so it still has a positive impact on safety.

In the event of a serious accident police will likely check to see if it was tampered with and so sentence will be more severe

Uh, oh! That's great. Need to get an Arnold Rimmer or Captain Kirk one.

Of course, one wonders what the car does if the camera is blocked with a post-it. Will it just not work, or fall back on something else, like pressure at the steering wheel, like Tesla does ?