There's not alot of people doing that. The biggest problem is
those who refuses to move to the center of the train, and those who
always shove their way into the train without letting passengers
come out first...
Recently I keep on getting stuck in the crowd trains also, cannot
get out. Surprisingly, it's not the people outside who's making
things difficult for me, those people in the train are!
I keep saying 'excuse me' but they act like never hear or
something. They refuses to budge WTF.
Since that's the case, I just shove my way out. They fully deserve
the hard shoving if that's their attitude. 
