I grew up in an extended family where lots of babies were produced and most were breast and bottle fed (together, as a routine). The fathers would feel the baby via bottle at least once a day. Some had more bottle included, some drank a larger proportion of breastmilk.
Until I heard other people complaining or debating about breastfeeding, I never thought twice about it. It was very normal for mothers to feed during a family gathering. Nobody paid any more attention to it that if it had been a bottle.
So it doesn't bother me at all, in any place, at any time.
I'm not planning on having kids, but if I did, I would not be breastfeeding due to a pre-existing condition that would require me to go off medication while the baby was in the womb but would require that I go back on that medication, which makes the milk unsafe, as soon as the baby was born. I'm not sure if I would anyway --- I like the idea that if something happened to me that rendered me unable to feed, the baby would already be used to bottles.
I think breastfeeding in general, and choosing to feed in public, is really a decision each mother should make with each child they have. It's hard to make a sweeping generalization about any of it because there are many reasons why a woman would or wouldn't breastfeed, and many reasons why she might or might not feed in public. I think it's between mother and child and it's nobody's place to judge.
It seems to me that childbearing and rearing is an area that results in a lot of very strong opinions and unfortunately, sometimes, unsolicited orders about what you MUST and MUST NOT do from people who have no business going there (ie, people who waltz up in public places and start instructing you on your pregnancy, or people who bark at you for this or that about your kid). Sometimes it's to be helpful but sometimes it's politics.