The only new car I’m aware of that should not monitor you would be the Slate pickup. Early in their development they mentioned this as a feature, but they haven’t brought it up in a while. So something to double check.

I’ve always enjoyed playing with folks who actually know this by giving them intentionally misleading cues. Instead of “E as in Echo”, say “G as in Gecko”. That sort of thing. Cuneiform, Frisky, Mango, Oubliette, Zima…