But that has happened. Idaho, for example, revoked plates and titles that had been issued to GP hmmwvs. In some instances, the vehicles had been transferred a couple of times since titling, and the 3rd or 4th owner , who had bought the vehicle as an on-road hmmwv at a much higher price, found themselves with a non driveable vehicle.
What we have now can't possibly work - identical vehicles are sometimes OK for on road use, and sometimes not. How can poor LEO be expected to differentiate? I predict we'll see a blanket ruling one way or the other. I'm holding off on a hmmwv until that happens as I don't want to be stuck with something I can't drive...