Lane keeping is often hard to disable and you have to do it each and every drive, so getting that off permanently and putting the car offline then that is an unexpected bonus. Probably the same also applies for the speed limit beeper that partially relies on GPS maps. Taping over the front camera also works.
On an enthusiast forum someone made a little circuit board that plugs into the control panel of the steering wheel. When you get in the car, you press one button, and that simulates the button press sequence required to turn off the lane keep assist, speed warning and multiple other systems.
