That drives me up a wall! I am big advocator that if an elderly person gets on, you give up your seat. That's odd, cuz in NYC, you would be made to get up for an elderly person. I don't know where you are though (and it is a train, not a bus, which is different since the driver is right by the disabled seating.)  You don't choose to age. You do choose to be a fat sack of shit though.