Local councils and community groups have tried high-pitched frequencies, security guards and police, even smoke cannons.
But Christchurch has upped the ante: playing classical music at bus stops to deter anti-social behaviour like loitering, fighting and bullying.
Dr Samuel Mehr of Music Lab and the School of Psychology at the University of Auckland joins Emile Donovan to weigh in on whether this is a tactic likely to soothe or aggravate.
