It's a shame that SF politics are so dysfunctional it can't have a metro at the same level of quality as, say, North Korea.
Riding without a ticket? Jail.
Littering on the platform? Straight to jail, right away!
Doing any violent crime in NK transit? Believe it or not - death by firing squad.
Here is a quick overview of how the system works: https://youtu.be/eiyfwZVAzGw?si=CnOMa8F6NkiyhifE
Setting aside safety for a moment, consider just hygiene: BART is shockingly dirty. Which suggests mismanagement, above and beyond just a lack of detterence of criminality.
As for safety -- firing squads are probably not in the cards, but would jailing the violent be too much to hope for?
Not saying SF politics is great, but at least point to the correct boogeyman.