Manners in public..

I live in a city where cars are the normal transportation system. I've only used the bus 2 or 3 times ever, living in this city. But in some other cities and countries, they have public transportation and they have rules and manners on there. Like in Japan, I heard that it's rude to put your make up on in the train and sometimes eating is looked down upon. If you use the public transportation system, do you think there should be rules like this or do you think people have to put up with this since it's public? Thoughts?