BeCool, I think the poster's extreme revulsion reflects the fact that for many people, just knowing someone is feeding a baby is related to deeper, possibly unconscious feelings, that they dress up as 'offence' at someone's bad manners or lack of 'consideration'.
I mean, logically, there is literally nothing offensive about feeding a baby, using breasts or bottles, or spoon and bowl.
So of course it's to do with deeply unhealthy attitudes to women's bodies, women's behaviour, women's actual freedom to be out-and-about with little ones, attitudes to body fluids (see how often pissing and shitting are brought into the argument, as something you wouldn't do in public).....and many people, rather than admit "I am seriously fucked-up in the head here, and possibly misogynist, too' which is a hard thing for people to confront, they decide the woman is to 'blame' for it all, for flaunting or exhibiting herself, or whatever ridiculous thing is said, and she should stay home/cover up/use a bottle/go to the toilets.
It's all mad.