Once again I have to say that most objections seem to be down to ignorance. Have you ever seen a woman breastfeeding?
You can hardly see any breast at all. Especially if the woman is wearing a breastfeeding top you literally won't see anything. Even if you stare.
EG.
http://ainulners.files.wordpress.com...ursing-top.jpg
http://z.about.com/d/diyfashion/1/0/...ursing_top.jpg
Seriously now? You can't be objecting due to the fact you'll see breast. You must just have a problem with breastfeeding in general?
You'll see far more breast walking around a town on a sunny day when people get their low cut tops out!