There was a general rule in America when it came to waiting for an elevator: you stand a bit off to the side, so anyone ON the elevator can disembark before you get on. I remember being a child and my mother forcibly moving me to the side to let people get off the elevator, and I have seen moms do it since. I know this is the etiquette being taught in America.
I am sure, by now, you see where this is going. Greeks do not seem to have the wherewithal to realize that, especially in these teeiny Greek elevators, there is no getting on until the people on it get off. Greeks are ready to charge right on in and keep going, without even giving the person inside time to get out. It is as if the elevator itself has some sort of invisible force field, shielding all who are outside it's doors from the occupants within.
It is such a problem in Greece that I have had people actually say "thank you" to me when I am off to side and let them get out before getting in. That really shouldn't demand a thank you, that should be automatic behavior. And I have yet to see a mother restrain her little heathens from running ahead and getting inside the elevator before I get out. If I were a mother I couldn't imagine that, because in my horror I would see the children in the elevator without me without a way to get to them. I also couldn't imagine that because I was raised to push my children aside with the force of God and let people get off the elevator. But Americans are violent like that.
Still, considering, this behavior isn't surprising, what with the whole lack of thinking before you act here. But it is ironic, these little niceties, these little polite gestures I never paid much attention to until I moved here and they were nonexistent. Americans may be crude, they may be warmongers, but by God, we stand to the side and let people get off the elevator. It is the least we can do.