Neighbourhood Watch programs - do they change behaviours?

I am interested in whether ---- Watch programs (such as 'Neighbourhood', 'Beach', 'Park' etc) have been shown to change/alter behaviours, or create new positive (or negative) social norms. On the surface, it seems they have good potential for transferring all the aspects of social diffusion, public pledge, cohesion and information penetration that are required for CBSM. What does the research say?

Thanks, DK.

David Kuhn
Regional Strategic Coordinator, Waste & Resource Recovery
Southern Sydney Regional Organisation of Councils
Australia