One of the more egregious innovations of Chairman Mao’s cultural revolution was something called the ‘struggle sessions’. This involved the ritual public humiliation of anybody the local bigwigs had turned against — often in sports stadiums. The elderly Yangtze swimmer would have smiled approvingly at what has happened to Ollie Robinson, the England fast bowler who was forced to read out an apology on the eve of his first Test match for some daft and obnoxious remarks he made eight years ago on Twitter.