Will history remember this as the day the planet started to rein in big tech? Australia firing the first shot by banning under 16s from platforms and social media that include giants such as Instagram, YouTube and TikTok. We’ll of course ask if rebellious teens will make light work of the ban. More broadly, is this the day regulators start treating merchants of scrolling the way they do tobacco and drinks giants, like businesses with a penchant for encouraging addiction.