Lets see how principled they are when they twig that moving to Costa Rica requires mandatory vaccination. 
This kind of bollocks about natural birth pisses me off. Without medical intervention, both of my sisters and I would be dead. It's as simple as that.
I fucking sailed through pregnancy, textbook all the way, did the hypnobirthing and yoga and was fully convinced that I'd deliver naturally. Well, DS and my body had other plans, and I don't care. We all came out of it alive and healthy and that is all that matters. I refuse to be shamed by a parent who looks down on my EMCS.
It's all very well to play hippies with your own lives. Choose not to get medical treatment yourself. Choose not to get vaccinations or wear shoes or whatever. But until your child has the choice themselves you choose the best for them.
My DP had asthma as a child. Even now, he cannot leave the house without an inhaler, such is his fear of an attack. Yet in the 20 years I've known and been with him, he's never had an asthma attack. He says its one of the most painful, terrifying things he's ever experienced, and this is a bloke that's had building site accidents and pretty much every bone broken in his body playing a physical sport.
To deny a child relief from that pain and panic of an asthma attack for hours until it got so bad they had to go to hospital is neglect. I'm not one for rushing to the GP every time there is a sniffle, and I'm a big believer in the ability of the body to fight off minor things. I breastfed until he self weaned and would have quite crunchy leanings. But I vaccinate because its my duty to my child, and would bring him to the doctor.
I take risks with my health, as is my right as an adult. Its not my right to take risks with my childs health so I can pat myself on the back.