The RMT called for the courts to take the "hardest possible line" against those found responsible. * The human cost of virus misinformation * We showed volunteers an anti-vax video. How did they react? The RMT has formally raised the issue with TfL and said warning bulletins highlighting the danger of injury had been issued to staff. General secretary Mick Lynch said: "Any anti-vax conspiracy theorist resorting to this disgusting practice of lacing their propaganda with razor blades needs to know that they will face criminal prosecution and the highest possible sentences.