Just a heads-up for Avon Gorge climbers, that a group of around six teenagers were throwing rocks down from The Downs in Clifton, Bristol, into Main Area/Main Wall this evening. I've heard of this happening at least once before, in recent weeks. In addition to throwing rocks downwards - just adjacent to some climbers on Main Area - they were throwing them some distance towards cars on the road! We should have called the police, but our phones were at the bottom, whilst on multipitch!