I just read that if you start the car, if someone happened to get in it and take off it'll drive till it runs out of gas. Is that true? That doesn't seem very safe. My other car isn't keyless but has a remote start. If you don't put the key in within ten minutes it shuts off and without the key if you step on the brake it shuts off. Also, how close do you have to be to open it? If I lock it and go in my apartment which is 20 feet from where I park will it open for anyone walking up to it?