They dress like pioneers and seem isolated from wordly things. They say that the kids from YFZ had never seen crayons and it makes the news when its learned that some of the women wear contact lenses.
I think there's a huge misconception that the FLDS are like the Amish. Not so.
I read Carolyn Jessop's book "Escaped" and was very surprised to learn that her FLDS family drank wine. It appeared from her description that wine is not considered taboo, the women partake of it as well and getting drunk isn't unusual. She spoke of drinking wine as a beverage, not as part of a religious ceremony or anything like that. She also mentioned drinking coffee but that, it seems, was to be hidden.
We need to get a better picture of just what is and isn't permissible in this society. We're jumping to conlusions based on their dress and apparent lifestyle that may not be the case.