Always pack out toilet paper in Zip-Lock type bags. Avoid cutting switchbacks and trampling vegetation. Camouflage all anchors with rock-colored paint. Use chains for rappel stations, or leave rock-colored webbing. Appropriate restrictions can include prohibition of climbing around Indian rock art , pioneer inscriptions, and on certain formations during raptor nesting season.
Power drills are illegal in wilderness areas.
Never chisel or sculpt holds in rock on public lands. Carpool to the crags. Other people have the same right to undisturbed enjoyment of natural areas as do you. Don't trespass in order to climb.