In reply to FBSF:
We walked around the quarry yesterday approaching from Eyam. The little rubbish we found was mainly away from the climbing area. Overall it was "spotless" to quote stp. Lot's of orchids and other flowers on the approaches. It all looked very nice.
It is possible that the people who left the barbecues simply forgot or assumed other members of their group would tidy up. No a good excuse but I know I have left litter at crags.
Not half eaten sandwiches though, I go for the complete lunch. In February we eventually got some snow at a club meet in Glencoe and a few of us headed off to Aonach Mor. After a plod through thigh deep snow I emptied my rucksack to gear up at the bottom of Golden Oldy. It was still snowing. After the usual faffing I checked nothing was left lying around and we set off. A few hours up we stopped for a break and a bite to eat. Where is my food? Buried in the falling snow at the bottom. Fortunately my partners had plenty. I considered posting in the lost and found columns, offering a free lunch to anyone who found it. I didn't do this but have at last confessed.
So litter louts come in many guises. Some do it deliberately but others are just inherently careless.