That's not to say that what's happened among the Warren Jeffs group should be legal. As I understand it, several of their underage marriages were accompanied by the threat of violence. I believe this is symptomatic of what I'd call black-market polygamy. Polygamy that must hide and convert kids, often by force, at ever younger ages. This was not the case among the early Latter-day Saints and their practice of plural marriage. When it was legal and out in the open, there was no abuse.
Everything-Voluntary stands with those seeking to legalize their freedoms of religion and association.