I know your pain on that, on my truck I have a urethane air-dam sort of thing. For the most part its not a problem, however there are always those incidences in which you just might hit or go over the concrete stop because you can't hear over you stereo . I've replaced it once not because of stupidity or carelessness its just a given problem, so I think its a great idea, save you future cost of that one time of oops cause no one is perfect. I say go for and have a toggle sensor on it so when you turn in for parks it goes off but not when your exiting a V driveway.
Tyson