I was not a major BART rider and cannot comment in depth but this is a thing that happened. https://www.sfgate.com/bayarea/article/Human-waste-shuts-down-BART-

I was not a major BART rider and cannot comment in depth but this is a thing that happened. https://www.sfgate.com/bayarea/article/Human-waste-shuts-down-BART-escalators-3735981.php https://www.sfgate.com/bayarea/article/Human-waste-shuts-dow...