What needs to be remembered is that the area is now well to do and is a magnet for chancers, not just from the UK but from the rest of the world. I remember when the P4 bus was re-routed down Court Lane and the residents there noted an increase in crime ( I was told this by a Court Lane resident)-so they campaigned and had it re-routed through Dulwich Village (where I suspect there is CCTV coverage unlike other areas). You just have to shred sensitive documents and be vigilant on the street and pro-active as regards home security. If they are in your front garden they are trespassing and you can call the cops- you never know, they may be part of an international ring of forgers!