I actually almost got into a fight with someone mad I was rushing into the elevator last year. I told him to fuck off and his girlfriend had to pull him away. Really what do I care when elevator doors open, if I'm preoccupied I'm going to be standing by the elevator doors trying to get on the elevator as soon as possible. I feel like the person getting off the elevator is the only one who knows they're on the elevator. It's not that big of a sin if someone acts polite once they know someone else is there, but if you mouth off to me in an impolite tone, you're going to have to hear it coming back.