The solution is simple, install facial recognition software and cameras (already there) make a database of the lunatics and criminals then ban them from the system, arrest them if they are seen on the cameras. It might not be perfect, but it will reduce the number of incidents on subways and buses while giving justice to victims. Public transit is under surveillance, get used to it, or don't use it, it is now, the difference is facial recognition software and AI will be monitoring it, humans still make the final call, just like here when
@sunni squashes someone!