I try to avoid facebook arguments but I did get in one heated one a few years ago. This woman I went to high school with is very vocal about her antivaccine, super crunchy (while going to Taco Bell on a regular basis), attachment parenting, cosleeping, baby calls the shots views. Whatever, beyond the vaccine thing you can do whatever you want with your kids as long as it doesn't affect mine. Anyway, she posted a meme on facebook that was a picture of the ingredients label on a can of formula and the caption said "store bought formula is 81% fat and sugar. And we feed this to our kids?!?!?!?!" She prefaced the post by saying that it wasn't meant to offend or judge any of her friends who bottle fed their kids she was "just saying...."
Then she and her fellow crunchy friends started talking back and forth about how terrible it was that store bought formula was even an option and how babies are hurt because it's still offered for sale and moms that bottle feed only do it because they are lazy and on and on and on. Then one of them comes up with this gem about how if for some reason you genuinely can't breast feed and aren't just too lazy to do it (and she stated multiple times that there are absolutely no medical reasons why a mom couldn't breastfeed) then they should use homemade formula and that sugar was never needed in the diet and she just couldn't understand why people were getting offended by her comments since she was just telling the truth.
There is having a differing opinion and then there is just downright stupidity.