The reason you need to physically remove yourself is because of the insane lunatics that blast trash music and do a dance while aggressively panhandling or screaming at you for trying to commute quitely on the train to work. A hallmark of daily life when I worked in SF and in NYC.
A great way to fix the fake problem would be to aggressively enforce the existing laws, starting with tickets, and if that doesn't work, incarceration. Apparently it's not politically correct to do that though so I guess we are all second class citizens who need to live in a low trust society where people are increasingly isolated.