Bricking comes in many forms. For anything that is installed by a third-party, Tesla has no obligation to enable it or keep it working. If Tesla can change their code so that the device stops working, or better yet, stops the car from working, that is what they should do. They don't need to brick the car just beacuse it has a device, just change to code so that an installed device bricks the car. I doubt they would lose a legal battle. In fact, speaking of legal battles, if there is even a whiff of reverse-engineering involved here, I believe Tesla will be the first to file suit