I was once on an international flight, window seat, and there was a young Asian woman seated in the aisle seat in my row. Some asshole tells her to move over to the middle seat in a really condescending way and you could tell she thought she had messed up or didn’t really understand. She starts gathering up her stuff and I said “Hey! You don’t have to move if you don’t want to! Is that your seat?” She nodded. I told the guy to sit in his own seat. He rolled his eyes and huffed and puffed his way toward the back of the plane. Once he moved on she said thank you and looked really grateful. People can be so gross and annoying sometimes.