Spread out guy -
Mom of the day (notice the distance between her and the stroller, the headphones and the concerned looks from fellow passengers) -
And a young, well dressed, Asian woman sitting next to me on the way home opened her large purse, pulled out a piece of gum, unwrapped it and threw the wrapper on the ground. Did I mention it was a large purse? I looked at her for a couple seconds, but she stared straight ahead and ignored me. No swooping down to pick it up for me, as I didn't want to put my face in the crotch of the guy in front of me. Apparently, littering is across socio-economic boundaries.