In the past 48 hours several business buildings and sign posts were tagged in Salemtown by rival gangs. Our last incidence of gang-related graffiti was in March. The night before last one gang tagged the buildings and last night another gang tagged the first gang's tags and hit other spots.
The best deterrance to gang-related graffiti is removing it as soon after the tagging as possible. That also keeps it from spreading to other buildings in the neighborhood.