My car is a 50's custom and the door handles and locks are shaved off and the doors are smooth where they were. I cant lock the car but no on knows how to get in there with the missing handles.
It takes a key less entry remote to open the doors and trunk but my fuel pump and my ignition is wired to a relay that if you do not use the remote to get in the car it will not start.
But knock on wood I have never had anyone try to break into it, and I am so sorry to hear that it happened to you.
Billy