It does happen.

My sister takes a medication that is contraindicated for breastfeeding and she was harassed when my niece was an infant.

Even when she defended herself and explained the reason, she still received criticism. There were women who postulated that if they were in her shoes, they would clearly do the "right", "unselfish" thing and simply stop taking the medication. Completely out of the question in her situation, but the haters generally assumed she was exaggerating her condition and using the medication as an excuse.

Obviously there were only a few of those conversations. Mostly from holier than thou acquaintances, certainly not strangers in the grocery store. But she was the recipient of a lot of dirty looks, sad head shaking and rolled eyes when she was feeding her daughter out of a bottle in the mall or elsewhere in public. Despite the fact that no one even knew what was IN the bottle!

Luckily for her, her husband does the food shopping and men seem to be immune from having scathing judgment levied their way when they have the audacity to plunk a can of formula in their cart at Costco.

Nipple Nazis need to take it down a notch. And for the ones who find that term offensive? Stop acting so militant and people will stop using over the top terminology to describe your behavior!!