When Rassie Erasmus taps the “follow” button on X (formerly Twitter), South African fans will again delight in the fact that their cult hero/rugby coach follows only one account at a time.  That is the official account of his next opponent. It is a move that sits somewhere between mind games and mischief, instantly igniting the comment sections of South African and opposition supporters. It’s viewed as a call to arms of his legion of fans, the next target and in most cases, their next win. If the Springbok coach ever writes a book when he retires, he could call it Strategic Trolling for Performance…