<p>My biggets rule was that I did no want my D. to be driven by her friends, I wanted her to dirve them or go by herself, but be a driver, not a passanger.<br>
We have swithced the ownership of her car to her as soon as she had reached certain age (I do not remember when it makes sense). We did not want her to drive OUR car, the car should belong to the driver, this is our family rule.</p>