It sadly doesn't work like that. Idiots are idiots. "You sold me this truck, and it doesn't work anymore.

- Well, we stated that you shouldn't do what you did...

- It doeesnnn't work !!!"

Ensue time, energy and money lost to defend yourself against idiots who don't listen.

Edit : I don't know anything about trucks or John Deere. But you can see this type of "artificial" limitation with simple unlock pretty often. For example the cpu overclocking community : the manufacturer doesn't officialy support overclocking, but they give hints and some advice if you want to do it anyway. You fry your cpu, you're on your own.