Leave no trace.

When crossing the street, do a little jog and wave at the cars to thank them for not murdering you.
​Sit in the aisle seat so if you have to go to the bathroom you won't have to step over anyone.
Never use the wheelchair stall. What if someone comes along who really needs it?
Never answer honestly when asked "How are you?"
Cross your legs and keep your bag on your lap.
When you go numb cross the other leg.
Aspire to invisibility.
Don't eat meat.
Don't breed.
Don't drive.
Don't fly.
Hush.