(e.g. not borrowing the car again for month or so)
Not borrowing the car? Why are they allowed to borrow the car in the first place? If they want the responsibility to drive themselves around, they should at least be responsible enough to afford their own car and insurance. Something to do with respecting the things that you earn yourself. I can't tell you how many times I've raged at the sight of a 17 year old smart-ass driving around a new Audi A4 that his daddy bought for him. There's no way in hell that kid respected anyone on the road, let alone his parents who gave it to him. And I'm speaking in general here. I know at least one example of this, and having graduated from high school in a wealthy area, I've seen the same story played out ad-nausium.
Please people, don't buy your children their first car. Make them earn it. I mean, when is the last time someone bought you a car, paid for your insurance, and filled it up every Friday with gas?
All seems condemned in the long run to approximate a state akin to Gaussian noise. -- James Martin