That would take an entire amending of the constitution. It's about as much of a threat as PETA forcing us all to be vegetarians; sorry to dismiss your outrage.
This is the same tactic the far right uses. They have a conflict in, say, california, and so they go off and find some total wacko and characterize all of california as being that way. Slate is all pissy about abortion "rights" and so they want to heap ridicule on South Dakota, since they can't make an argument beyond just insisting they are graced with "truth".