Make shift kill switch?

I know there are alot of threads about the various ways to install a kill switch for anti theft purposes and that they almost all involve cutting off power to the vehicle. I was wondering if there was another option.

The other day I was driving and the rubber vacuum caps on my break master cylinder popped off which left me with basically no breaks. Thankfully I had replacement plugs in my glove box.

But it got me thinking about vacuum and how even the smallest leak can wreck havock. That got me wondering if there is a vacuum hose or cap that a driver could pop the hood and remove before parking their car which could stop your run of the mill thief from driving away with your car.

Like is there a vacuum port on the carburetor that if disconnected would keep the car from starting or make it idle so rough that they couldn't get it out of the driveway? Could be an interesting way to thwart would be criminals without a ton of modifications. Maybe a small release valve in the middle of a vacuum hose that could be turned to create a vacuum leak but would look pretty inconspicuous to the uninformed.

Maybe this is a dumb question, I really don't know. I rebuilt a carburetor one time in my 20s and my dad helped a lot, without really explaining much so my knowledge is pretty barebones.

But what do you guys think? I know a manual transmission is typically enough to stop the dumbest of thieves and that a truly determined crook will just tow it away but something like this to stop those in-between cases would be nice.
I'd just take the coil wire off.

Yes you could do many other things that are way more complicated, but who the hell is carrying around a coil wire? If they want your car, they will have a trailer.