Overhead on the arguably quite tough EK525 HYD-DXB currently boarding (a red eye turnaround for the crew) from one of the FAs during boarding directing Pax at the front of You:
"Do you see the numbers at the top?"
She's mostly just telling people "last cabin", "last cabin for you", and when she was standing in my row as I arrived and with a smile I remarked "Excuse me, you're in my spot" she gave me a blunt look and simply moved, not acknowledging the smile or (I thought) friendly tone of my voice.
An unfortunately frequent occurrence on these flights, which I think is also due to crew's prejudice towards the predominant passenger segment, who have little to no travel experience.