RustySpork
Oscar Mayer Memer
If you are able and you see someone who needs a seat, then get up and offer them your seat, I know your feet hurt, so did mine. At the very least offer your seat or find out if they need one. With that being said....Put your kid in the stroller and hang the bags from the grip if you are one of those people. Chances are the room you need is by the door anyhow.
Do you offer your seat to people who are your age, and your gender?