my 91 jetta start up with having to push the clutch in.
my 92 honda has it, and it's a yellow sensor near the top of the clutch pedal.
i disconnected and ran the two wires together.
my neutral safety switch was pretty much my parking brake cable, my alarm wouldn't do remote start unless the barking brake was on.
so you could set it up like that i suppose.
i'm surprised anyone noticed. most people just push the clutch in when they turn it over out of force of habit.