I ride the bus and Bart in the San Francisco bay area and I've lived here my entire adult life. It is not fine. About once a week some kind of event happens. Off the top of my head these are things I have experienced both on Bart and AC Transit (though mainly Bart):

* I've been punched twice. Not hard, but an angry person hitting me in the shoulder and the back because they were drunk or high and I guess I looked at them wrong

* I've been shoved out of the way hard probably five separate times?

* People openly smoking crack, smoking weed.

* People high out of their mind. Just on monday some guy had his pants around his ankles high out of his mind swirling around and rubbing up against riders.

* A man shouting and punching the top of the train saying he's going to kill himself

* A man screaming profanities, calling women the c-word, sluts, saying he's going to rape people

* Multiple fights

* Someone getting their phone swiped out of their hand and punched in the head when he tried to chase them.

* I watched someone eat most of a burrito, stand up, turn it upside down and squish it onto the seat.

* I saw a man with a concealed gun tucked behind him into his belt walking around the station looking for someone.

These are definitely some of the worst events, but something on the spectrum of "bad" happens weekly.