Step 1. Be very, very single

When I was a younger man, audio visual forums used to have an unfortunately sexist, but fairly good conceptual measure they called “wife acceptance factor”. It should really just be partner acceptance factor. Regardless of whom you are with, I hope they would physically intervene before letting you do this. What is the point? All of these posts feel like they miss the forest for the trees. Don’t like This Modern World? Fair enough, start by leaving your phone at home. Pay cash. And so forth. The author’s problems would be better solved by taking the bus. If you’re going to get into messing with cars, the wiring harness is not the place to start. Every trip to the dealer or any other mechanic is going to be painful right up until you finally give up and try to private sale the vehicle. At some point in that process, after you have dropped the price by over half the Kelley Blue Book value (or whatever Palantir shit replaces that) you may actually hear yourself explaining to the pleasantly smiling with a certain look in their eye non buyer about how you had to do this.

I will admit my bias. Fair play to the author for putting this all together but it reads like a very intricate aluminum foil hat.

Counterpoints:

1) My auto insurance is already too expensive. I have zero interest in "oh yeah we had to add to your driver factor because telematics says you exceeded the speed limit 11 times last year :^)". Less tracking is just a bonus.

2) He made no irreversible changes to the vehicle. Just keep the part and plug it back in when you need it for service/inspection or whatever.

3) "Telematics disabled" probably adds to the resale value of the car.

What are you talking about? People sell used cars with broken stuff all the time. You don't have to tell the buyer that you intentionally broke that feature. The mechanics that I use would all consider this modification entirely reasonable and not say anything about it after you explained yourself.

Also my spouse is just as paranoid as this guy is and when I told her what new vehicles collect she was happy she had an older model car. So this is not really a thing.