When I drove from Florida to California, I spent the night in my car at rest areas along the way. This absolutely infuriated my mother when she found out but, other than a few freezing nights, it was a rather uneventful trip and I think I actually saved time doing this as well. Obviously, there are risks sleeping in your car just as there are risks crossing the road. That being said, is it considered ridiculously dangerous to sleep in your car at rest stops through the night?