I think you are all going way overboard on those layouts. The pit exit cones aren't needed as they get in the way of the racing line. The paint on the track is there for a reason. As for walls and extra tires, it isn't a beneficial place to cut and the first place, so I see no need in making it any more treacherous by adding flying cars and tires into the mix. Sand traps and LFS's default tire placement should handle the problems. My :twocents:.
For pitting, if you can keep objects to a minimum, you could add the layout under caution, and then remove it when pitting is done, but for during the race, it is just a hazard.