If you see vandalism in progress, call 911. Document it if it is safe to do so, and pass that information to the police.
The BID has a graffiti-removal program during the warmer months for ground-level, street-facing surfaces. Property and business owners are encouraged to report graffiti to the BID through emailing a photo, address and description of the surface (brick, painted metal, etc) to info@atlanticavebid.org.