By Charlie Conchie Elon Musk has suggested that Twitter could be split up into maturity-rated content streams to ring-fence harmful and extreme posts, as the debate over moderation of material on the site rages on. Musk completed a months-long fractious takeover of the social media firm this week and has long hinted he will take a more hands-off “free speech absolutist” approach to policing the platform. In a post on the site, Musk said he would form a content moderation council with “widely diverse viewpoints” in a bid to ensure posts and accounts are not blocked for political reasons. But re…