Worst case of disrespect I've every seen in a campground!

Chalk can be washed off however how many campsites have water where you can hookup a hose and wash it off? And I'm not saying that you can't do something. I've seen chalk at my local state park and it was left on the roads etc.... atleast the kids were outside playing and not on their phones as for the damage it looks like maybe underground locate paint possibly as you can write on the ground but I do AGREE that what they did was wrong.