Yes, I am aware of how to turn them off, and it was good to see a reminder on that, thanks Laidoffsick.
I personally would rather not have marker lights at all on the tender of engines, with only a few exceptions like PRR, that the prototype did not have/use. They aren't correct and I personally just really don't like them. It's as though the manufacturers fell that the more lights added to the animation of a model engine, attracts more buyers.
And as far as Class lights, I agree with Hot Water.