I echo those who say that they support the right of moms to BF in public, but please practice some modesty! I was on the subway the other day, and this woman started BFing her kid without any type of covering. On the subway. After a long hard day at work, why do I want to see this? If she has some type of throw, pashmina, something, I would have no issue with it.
I do agree that bfing in the bathroom is nasty, though. And really, eating in the subway is pretty similar to eating in a bathroom since it's so unhygenic.
Although, I prefer that people don't eat on the subway anyways, so grain of salt, I guess.