One reason why people annoy me

Do you know what yanks my chain? People who sit on the aisle side on trains and put their bag on the window seat. It's just not playing the game, everyone wants to sit alone on the train reading about eastern europe economies in The Economist but if someone wants to sit next to you, by golly you've just got to like it or lump it. The only thing worse is the people who pretend to be asleep while taking up two seats so that you feel bad asking them to move.