And if you look respectable you can get away with it. Life hack!
And when the BART starts breaking down and looking shitty, we'll know to blame you guys for not paying for it.
It's already pretty shitty. Have you tried traveling from downtown SF through the Mission stops? The tunnel is incredibly loud with screeching/scraping noises, and it's been that way a long time, apparently a product of how the rail is designed.