> If people are screaming at you or smoking meth on the bus, that’s indicative of broader social problems which aren’t really solved by changing the transportation system.
Knowing the proximate cause doesn't help me avoid crazy people on public transportation. The problem of crazy people in the bay area won't be fixed any time soon, so it's still in my best interests to avoid public transportation. Also, it's not clear to me that many of these people can be fixed. The bay area spends enormous amounts of money on mental health and homelessness, but the problem is far worse here than it is in Boston.
> For what it’s worth, I ride buses, trams, the subway, etc. all around San Francisco on a daily basis with my 2-year-old, and haven’t ever felt threatened.
There's no nice way to say this but... I don't believe you. Every single one of my coworkers has a horror story about public transportation in the bay area. Robbery, theft, stalking, threats, harassment, catcalling, etcetera. There is only one woman at my work who commutes via BART, and she's only been doing it for 3 weeks. The rest drive or take Uber/Lyft because they've been robbed or threatened in the past. I think it's much more likely that my friends & coworkers are telling the truth than that you are. Either that or your threshold for feeling unsafe is incredibly high.
If you regularly take public transportation in the bay area, you will encounter mentally ill people, and some of them will engage in violent behavior without provocation.