Japanese manners posters in Tokyo train stations

Even though public transit in Tokyo is usually very crowded, I haven’t really noticed any kind of uncivilized or otherwise problematic behavior. In general, people seem very polite and considerate to one another. Still, Tokyo Metro last year started a campaign with a series of manner posters that remind passengers of good manners in trains and stations. Every month they design a new poster that is displayed on Tokyo’s subway stations. The posters are bilingual in Japanese and English.

This one here reminds you not to exercise on train handles, in case you get such an idea… :D

On the official Tokyo Metro web site you can see more of these posters that were displayed so far.
What do you think about this idea with posters for good manners?