A kill switch would be a deterrant but not absolute.
I would be more concerned that someone would come with a truck (as
they seem to have done in Va). So presuming that its in a driveway that
is accessible one way only - I would park to keep the drive wheels away
from the end that would be lifted - a RWD with the front out and a FWD
with the rear out.
Still not an absolute, but they would have to get it out of park OR jack up
the drive end and put dollys under, taking more time and making more
noise...
Another possibility is sink a post with an eyebolt in concrete at the
farthest end of the car. Use a heavy chain around the axel thru the
eyebolt
