Tiago Rogero in Rio de Janeiro
Sam Jones in Madrid
Angelique Chrisafis in Paris
Natasha May in Bangkok
Helena Smith in Athens
Leyland Cecco in Toronto
Hannah Ellis-Petersen in Delhi
Jennifer Rankin in Brussels
Dan Milmo in London
Kate Connolly in Berlin
Miranda Bryant
Alastair McCready in Taipei
Rachel Savage in Johannesburg
Ankita Rao
Nick Robins-Early
When Australia launched its ban on social media for children under the age of 16 in December, its global impact remained to be seen. The world watched with keen interest as the country adopted the most far-reaching ban yet, amid a global mix of incredulity, admiration and – among some – a staunch belief that many children would find a way to circumvent it.