I was crammed on the Dulles mobile lounge the other week with my nephews and my mom, and they had big backpacks on from flying economy plus without a carryon. Anyway, there was a huge backlog of people trying to fit on, I suggested to my mom she should take off her backpack and hold it in front on her feet, like I know from riding the packed train, because she is taking up the space of like 3 people.

She was like "why would I do that?" and left it on. And after completely missing the point, my own mom proceeded to whap me in the face with the backpack about a half-dozen times while the lounge was driving back to the main terminal, basically every time she turned to look out a window or whatever.

Anyway, good luck on your mission.