How fair is it to consume breakfast on the subway?

As it grows warmer, more and more commuters will be taking breakfast with them to eat on the way to work. Crowded carriages will smell of meat, garlic and soy milk, and some passengers will be bothered. Is eating breakfast on the subway the sort of bad behavior that should be prohibited, like smoking?

Ban eating and drinking on the subway

It's too crowded on the train in the morning peak. If you eat breakfast there, the smell of the food will affect other people. Since there's no trash can on the train, what will they do with the packaging or the rest of the food? It's very possible people would throw them somewhere on the train. If you are always in a rush, then why not get up earlier and enjoy your food at home?