That has no chance of being prevented by this.
Of course they do. They get state laws passed banning aftermarket/DIY electronics, in the interests of (safety|emissions|"The Children"|stopping terrorists|whatever the moral panic of the day is).
After that, all it takes is a state regime of vehicle inspections at registration time, and the ability to detect non-standard parts (electronically, and physically). Plus denying registration for a modded car.