I was in 1F, and was about the 4th passenger to board, so imagine my surprise when the guy in 3D put his bags above the first row, where I needed to put my bag. I watched him put his bag up and move back to take his seat.

I looked and him and said "Excuse me. Do you mind putting your bag above your head so I can put my bag above my head?"

He looked stunned, but moved his bag.