My view of breastfeeding in public is William's face and an inch or so of my breast. Everyone else's view is the back of his head.
I have breastfed in cafes, restaurants and pubs, on top of a mountain, and next to the main arena at a country fair. Most people don't even notice that I am breastfeeding. I am discreet, but William is a neat feeder (or at least he was when he was smaller), but to be honest I don't see what the problem would be if someone did see (GASP!) a flash of nipple. It is what tits are for, for God's sake!
If seeing a woman breastfeeding makes you uncomfortable, feel free to put a blanket over YOUR head.