Can't say as I've really heard about that movement myself, which is why I jumped to the Amish first since I'm fairly familiar with them.
Oh, you should look them up; the idiocy is spectacular! They think pasteurization is the height of evil, that it corrupts milk and makes it bad for you. My half-sister is one, and the height of her irresponsibility came when she happily consumed raw milk, eggs, cheese, and meet whilst pregnant. Or at least I thought that was the height of irresponsibility, until my new nephew was born and she revealed herself to be an antivaxer. For the record, this isn't the wonderful sister and nephews whom I post pictures of all the time!