Electric cars have to make noise on purpose because otherwise it would be a silent car.
And most of these noises are are weird futuristic WEEEE-00000 UFO sounds.
Therefore I posit that we should be able to change the noises our electric cars make
EDIT: These suggestions are Top-Notch! Keep em coming!
They already do that with moving billboards. In my neighborhood the billboards are louder than my tv at half volume. Really pisses me off when they roll by.