I really don't like it. Yes, I know its natural, but hey, its also natural to urinate, but people don't just go doing it when and wherever they need to, and call it okay by putting a blanket over the area.
I personally find it rude that these women have the attitude of "I am a mother, therefore my breasts and their milk should be welcome wherever"
If a woman wants to breastfeed her child, and doesn't want to think ahead and make a reserve bottle, she should at least find someplace secluded like a restroom.
I think the worst I ever saw was a woman walking up to take communion at Christmas Eve mass, with her kid up under her shirt going to town