In reply to Dandan:
I've also seen kids throwing stones over Cheyne Weares and they've stopped when told. Some years ago, there was a big crew of Eastern Europeans camping at The Cuttings for quite a while. Not really what one should be doing but I doubt they had any money, there was minimum disturbance and they left the place spotless.
They went off somewhere else, came back to their little campsite and lo and behold, somebody had pushed a car over the crag right where they'd been camping. That was it - they legged it. Understandably.
Although the biggest danger to climbers is probably poor belaying, there are a lot of other dangers: people lobbing stuff off, holds snapping, blocks coming off routes, blocks hidden at the tops of crags... The top of the Neddyfields bouldering wall has long been due to collapse. I believe there's a need for two signs at the top of Battleship/Blacknor Far South telling people that the normal access has gone and alerting them to the new ways down.
Apart from Marti's rebolting surge, a number of routes probably need recleaning (e.g. Valerian, Gaze of the Gorgon) and there are worrying blocks (e.g. the huge one to the left of One Fine Day). In the meantime, it may be worth carrying a helmet for areas such as around Pregnant Pause and stick-clipping any route if the first bolt is at all high. Also worth having some longer quickdraws for the bigger routes. And maybe also a 'may feel adventurous' label on some of the bigger routes.
Am grateful to the OP for raising these issues.
Mick
P.S. Fred/ALB - great to have you back!