In reply to monkeymark:
> They must live in their own little world and not care what the local ethics are.
That is almost certainly the case but perhaps we need to be a little more understanding. I used to live in Cowling as a kid beneath the excellent Earl Crag. As a child it never occurred to me that you might climb the rocks up there. It was just somewhere you went for a walk and played. Come university I started climbing and discovered there was a guidebook, ethics and a whole history of climbing up there. Up until then, me and my mates used to just scramble around the boulders. Had we decided to play mining, it would not have occurred to us the impact caused by knocking chunks of rock off for fun.
Perhaps the way forward here would be to erect a sign or notice explaining why bolting is frowned on? After all, if people don't buy or buy and don't read the ethics section in the guidebook, how else are they to learn?