Here is a design task for the Creative Team and for others.
Gangs tend to be negative because negative matters show easier achievement.
People often attack ideas because that is their only means of achievement if they are not able to have ideas themselves. I know that the 'Boy Scouts' was a successful movement in this direction but the movement is not attractive to all youngsters. Perhaps we should construct a catalogue of 'do-able' positive actions which can show immediate achievement. Just the feeling of doing the right thing is not enough for my purpose. The achievement must be visible to the 'do-er'.