As the events unfolded at Bondi Junction last Saturday afternoon, an unsuspecting university student was falsely accused on social media of being the killer.  It spread on the X platform and by the morning Channel 7 was also wrongly telling its large audience that Benjamin Cohen was to blame. How did the lie take off, who was originally behind it and how can we hold social media giants to account for misinformed and dangerous content? Featured:  Cam Wilson, Crikey associate editor