I'm an attorney, and do not practice in the area of personal injury. But to echo the common sense of BRGT350 above, I'd bet if you checked with your insurance company about your planned modification there's no way they'd endorse it. Further, if you ever get into an accident involving your own serious injury by the fault of someone else, would you be surprised if the other side was asking why your side air bag didn't deploy to lessen your injuries? In addition, I imagine a Ford engineer would tell you that you're compromising the airbag system in the case not just by removing an airbag, but by removing the sensors that go along with it in the driver's seat, which likely influence how and when the other airbags deploy. My friend does accident reconstruction, and he could probably tell you a lot more. At the end of the day, for a street car, it's best to keep your OEM seats.