Well it finally happened today. I flew back to see some family and rented a car. An ice car of course. I stopped at the grocery store to get some provisions. When I returned to the car there was a group of people standing around it. They said they were worried about the car. I had left the car running and the windows open and the radio on. I'm so used to just getting out of the car and walking away and having it shut itself down and lock up that I didn't even bother to take out the keys and turn it off. Lesson learned (I hope).