"Gang activity" refers to unlawful or criminal behavior carried out by a group of people known as a gang. This can include illegal activities such as drug trafficking, violence, intimidation, and organized crime. Full definition
They were not comfortable walking the halls of their schools and felt rules meant to discourage gang activity in the schools were of no use. (ascd.org)
The program is an online database that allows authorities to closely monitor gang activity. (wrvo.org)
The crime would address graffiti that promotes gang activity or is placed on religious property, making it a Class - E felony. (thebronxchronicle.com)