*adds*
People leaving behind garbage, truck parts and even worse empty beer bottles and such.
People with no camping skills, leaving behind trash, and waste @ and around the campsite. Why is it so hard for people to clean up after themselves... I go out to camp, because I like the outdoors & nature, not because I like sitting amongst garbage, and landmines of human waste everywhere.
People cutting their own trails.
Drinking & wheeling - not smart, and not a good showing to outsiders.
People not respecting personal property.
So much of this is common sense.