I don't see a problem on that page particularly.
The diet one says you need to avoid caffeine and alcohol and stick to a healthy diet to breastfeed. Oh fuck off! This is one of my most irritating breastfeeding myths. I DO like to eat a healthy diet (and I have a glass of wine if I want one thank you very much), but I have had friends give up breastfeeding so they can drink coffee, or insist on strictly following the pregnancy food guidelines while breastfeeding, and then give up because they feel everything is too restrictive.
I also know someone who didn't touch a drop of caffeine for over a year while breastfeeding, and it didn't matter how many times I said there wasn't any evidence this was a problem for more than a few babies, she said she wouldn't, and was very sniffy about me having a cup of tea!