This is getting worse right? It's getting to the point where they just launch themselves halfway across both and crush the person sitting at the window and don't seem to see anything wrong with this. Guy just did that to me so I elbowed him away and he turned to look at me in outrage.
I think part of the issue is people who used to drive are getting public transport more. Which is good overall but it also means a lot more selfish pricks in enclosed spaces.