What is your problem???

I was out eating lunch with a friend and her baby. She was breastfeeding her while we were waiting for our food. A lady came over and told her "you should really consider using a bottle when you go out or just wait to feed your baby. I think it can go without eating for an hour" and I told the lady "she's not bothering you so why do you care?" Keep in mind, my friend had a blanket covering herself. The lady leans over and says "it just doesn't look very classy and I lost my appetite watching it" well lady.. How about you just don't look? seriously how rude. She wasn't hurting anybody. When I have my baby in March I plan on breastfeeding and if we are at a restaurant, I won't care. My baby is more important than your appetite.