Climbing onto Cairns isn't too bad as most have been damaged by time anyway. What I would like to see stopped is the wanton damage done to the Cairns on Dartmoor by walkers, I think that is how you spell what they are called, who insist on making shelters out of the stones on them.
Over the past 6 years we , Dartmoor Preservation Association and English Heritage, have surveyed and repaired many only to find that within a few months they have been damaged again.