This is my concern as well, it becomes a weapons race towards the most idiot-sized vehicle possible, since a reasonably sized vehicle will put you at a survival

This is my concern as well, it becomes a weapons race towards the most idiot-sized vehicle possible, since a reasonably sized vehicle will put you at a survival disadvantage. I live in Denmark, where this problem is yet very much in its infancy, but it's a clear trend. I hope regulation catches up. Some kind of bounding-box volume and weight restriction would be nice.