Don't touch, in any way, the rock art or surfaces around it. The oils in your skin may cause damage to rock art. Don't apply any substance to the rock art surface, including water or any other fluids. Don't trace images with sticks, stones, chalk, or other substances.
Don't attempt to remove graffiti, chalking, lichen, bird droppings, or anything else from rock art.
Don't collect or disturb artifacts or features at a rock art site. It is acceptable to pick up surface artifacts, examine and enjoy them, or make sketches or take photos of them, as long as they are returned to the place where they were found, and no damage is done to the artifact.
Don't remove soil to expose subsurface rock art or archeology.
Minimize the number of vehicles going to a site. Stay on existing roads and trails. Do not "pioneer" vehicle trails or parking areas. Avoid disturbing rocks, vegetation, or macrobiotic soil crusts.
Don't allow children, pets, or inattentive people to behave carelessly around rock art sites. Kicking up dust or dislodging rocks can cause damage to the site.
Speak out when needed to prevent damage to rock art. Report new rock art destruction, charcoal near the site, or site vandalism.
Please remember that living people may consider these sites sacred.
Borrowed from Utah Rock Art Research Association (URARA).
Rock Art Etiquette
This photo is from Moonflower Canyon near Moab. It's one of the most vandalized panels in the state. Vandalizing rock art is such a dick move. Don't be a dick.