I quit riding the 0 bus and light rail a long time ago for this very reason; there were just too many kooks riding the same vehicles and I got tired of being hassled by these 'Constitutionally gifted' bums.  One time on a 0 bus a rider was sitting on the back seat and spitting chew on the floor.  This went on for a week and I finally told the driver about it and the driver kicked him off.  Another time some homeless jerk slugged me in the arm and that was it. I shoved him out of my way and bolted from the bus never to ride the bus again.  I was seated next to him when he slugged my arm. All too often bums would be harassing women on the bus and the drivers ignored it.  Many times prior to that drunks would be passed out in the aisle or would be puking on the seats. So much for a clean, safe ride!  No, I will not ride these 'bum busses or terror trolleys' anymore!