I’ve seen a lot of rude behavior on BART, but this had to be the worst ever! The Giants fan and the lady next to her were comfy-cozy in the priority seats while seniors stood around them. A nice young man offered me his seat near the center of the train; I declined and suggested he give it to the senior lady standing WITH THE OXYGEN TANK. Yes, oxygen tank. She was so sweet and so grateful. The poor thing could barely stand The other b!tches never batted an eye.