I had to click on this because my response was,
"well, yeah"
and I thought everyone else's response (here) would be the same. Then I started thinking about situations where I might think bfing isn't appropriate (the server here is pretty slow) and I came up with a few... a baby should not be taken out of a carseat and breastfed in a moving vehicle (this used to be allowable under WI law). and I could see justification for not being allowed to breastfeed in other dangerous situations as well, I just can't think of anything right now off the top of my head.
But the bottom line, as I see it, is that whether or not women should be allowed to breastfeed in a situation should be dependent on the health and safety of the baby and or the woman, NOT on the viewpoints of passersby.