No, gangs should be dismantled by any means necessary, its a national security risk, its an economic drain, and it disadvantages too many poor people.
Gangs don't terrorize rich suburbs, they terrorize the intercity, where I am from.
Its a simple matter, find the enemy, and kill them. You just outlaw criminal organizations and make belonging to them a capital offense. This was done historically to pirates, so its not without precedent.