I bf both of my daughters, frequently while we were out, as we usually were. If people watched it didn't bother me at all as they were just not on my radar. If I did notice, I'd just smile as I don't ever think I had any hostility. Some of my gay friends were really curious (as they were at all stages of my pregnancies), but I can assure you that that was not oggling, just a really beautiful curiosity. If anyone were abusive to a woman feeding a baby, I would hope that anyone nearby would step in and say something. And if anyone is uncomfortable around it, then they have every right to walk away and not be chastised for it. They don't have the right to complain though.