I will grant that a car is a fire hazard. But then again, so is a gas powered ICE. My garage has 5 to 36 gallons of gas between two cars, and two auto batteries; my basement has up to 500 gallons of fuel oil, and finally I have a 50 gallon propane sitting right next to my house.
Speaking of LiOn batteries, like many, I now have a a number of these batteries floating around the house, in addition to the ones in my laptops, iDevices, etc. Various extension cords, power strips with questionable MOV's, who knows what the kids have hid here and there.
Fire hazards seem to be getting worse not better.