Coding, what not to forget?

[TerminatorX5]

Short answer - NO.
Long answer - YES... the light switch S8 (like many other switches in the car) sends a signal to the LCM based on the switch position. There is a small circuitry inside the switch that allows the LCM to monitor the switch for the position and based on that, turn on/off specific light. The lights in the car can be turned on/off by sending specific commands on the iBus, and you might create a special effects light show (first 30 seconds of this video BMW M7 - YouTube). Thus, it is possible to build a box that will intercept the signals coming from the light switch S8 and tell the LCM to behave in your specifically desired way.

good example is a little box that I have for the TV module, that blocks the speed signal coming to the TV module and tells the module the speed is zero, hence allowing the TV to stay on while the car is in motion.

So, the answer is - do you want to build such a box?