DHS Block Association

I'm almost new to Community Board 4 but in this short time I see and can't understand what do they do. The state and the city is working hard trying to improve the area but nobody is educating the people on the area about how to help improving by keeping it clean and attractive for themselves. Trash cans and signs with message as ''this is your area; keep it clean'' is not a science or an expensive idea. How can we pass the message? How can we get this people to do something for themselves? Will love to get feedback.