Yeah, it's the oddest thing. Church is still best known for polygamy, but the Church hasn't sanctioned an actual plural marriage since before the Red Sox were first founded. I guess the hardest myths to dispel are the ones that were ONCE true.
Hello? Bigamy is ILLEGAL. We couldn't do our work if we went around doing that stuff. Certainly there's a lot of countries we could never have gotten our missionaries into if we hadn't abandoned the practice.
there ARE a few splinter groups that do it anyway. Those people tend to be a nuisance to the community around them. We help the authorities catch those people when we can, and if we catch a member involved in plural marriage that member is immediately excommunicated.