when the fat people in the aisle are pushing you over with their odorous girth.
If you are on a normal Polish train, the compartments are usually closed (aisle on one side, and compartments on the other), so how can these fat people (and why only fat? and why odorous, all of them?) push you over in your seat?
As I said, all cars are half non-smoking only. You need to check which half you are in. If someone smokes in the non-smoking half, people usually react very angrily to that and the culprit is banished into the aisle ;-)
Come on, don't make it sound worse than it is in reality. I'm a seasoned, born-and-bred Polish train traveller and I've had to sit on the floor by the loo once because of the crowding, but that was way back in 1984 ;-)
Some trains are crowded, some could be cleaner, but that's true of any railway. I am always happy that I get from A to B. Maybe I've been hardened by my communist-oppressed childhood, if so, I am thankful for that. ;-)