Personal Space:
Yes, this is America and you are allowed to grow your hair as long as you’d like, but please don’t flip it over your shoulder and let it dangle onto other passengers’ bare skin. Human hair that isn’t attached to one’s own head feels disgusting. While we’re at it, don’t lean your entire person on the poles in the middle of the car, causing everyone else to hold on for dear life and try their best to avoid touching your rump/shoulder/abdomen/cheek. Please.
Bonus link: Read a brief interview with Shelowitz at New York Mag.