the only thing that i think is pretty cool about the dubs is that you can go pretty much anywhere as a dub and if you dont know anyone there will be dubs who will help you, even give you a place to stay etc. I have seen this with my family many times, now it could have to do with the fact that my father is an elder and my sisters are pioneers/elders wives.
biblically nothing because they twist too many things and i dont believe in the bible any way