It seems to me that if your car is lowered, the shocks and springs are stiffer, you have sway (anti-roll) bars, and the wheels/tires are wider than stock, that the chance of the car jacking is greatly reduced? I'd sure hate to be in an autocross with some quick left/right turns and get flipped over. Limiting straps are pretty easy to add, and I'm definitely going to install them.
Gil