I have seen those posters at some Tokyo metro stations. I think they are good to show what is good or bad to people. But, I also think those manners on the posters are all common senses and we should understand about them without seeing the posters.
And I can't stand someone sits on the train spreading his or her laps . If I sit next on him or her, I feel unpleasant. They can sit without spreading laps!
