We live on the quiet corner of Stanstead Road and we are currently experiencing this problem too. It seems to be getting a lot worse and it's right outside our house sometimes. I can't believe people allow their dogs to do this! It is revolting. I feel like putting up a sign saying 'if your man (or women) enough to own a dog, be man enough to clean up after it!'. Probably not the best route and they probably won't care anyway but you are right that it definietly brings the area down although it's an endemic problem everywhere. V annoying! Having been inspired by this thread, I am on the phone to Lewisham now!