From 10 December, social media companies will have to take "reasonable steps" to ensure that under-16s in Australia cannot set up accounts on their platforms and that existing accounts are deactivated or removed. The government says the ban - a world-first policy popular with many parents - is aimed at reducing the "pressures and risks" children can be exposed to on social media, which come from "design features that encourage them to spend more time on screens, while also serving up content