Recently i noticed that none of the cars have keys in the ignition. I dont think this would be too hard to add, as all you would need to do is add a mesh. Sadly, im not a good enough 3d modeler to do something that intricate.
It's a common trend for Gabester's cars. He may.. ..or may not like using keys. See also: Burnside from Rigs of Rods.
it would either be stretchy mess more so than most things in a crash or a pretty lame way to use a few more Nodes and Beams that aren't necessary. Personally this sort of thing hasn't bothered me any. Just pretend your invisible driver has a magic hot-wire remove that auto hot-wires cars without touching anything. Idk I'm quite bored.