A customer's 40 coupe was wired up without a neutral safety switch (not by us) with the incident of jumping forward and biting his office wall. The adjuster quoted the damage at $6k and with the tri-stage pearl paint it will probably use that amount up. All with auto trans should do themselves a favor and wire in a NSS. It's easy to do with a universal type starter button that gets pushed by the trans linkage when the trans is in park. If you have a later steering column it already has one. Just run the wire from the switch to the solenoid through the switch and save alot of headache.
I agree with you, Evan but... I think it was the car's way of telling the owner that "you shouldn't have taken my vacuum assisted three 3 on the tree shifter out along with that 3 speed tranny and clutch pedal that makes such a beautiful thud when fully engaged!"
Another Way.... Is to leave the clutch pedal and wire a switch to it so the starter operates only if the pedal is held down...... Sorry to hear of the damage , glad no one was killed nor crippled for life .