Personally, Mormonism seems kind of kooky to me. But then again, to each his own. They don't engage in jihad, or acts of terrorism for one thing. They don't blame people of other religions for the problems they create. From what I've been told, their churches/temples engage in lots of charities for their members. The ones I've had dealings with seem like smart, hard working people, who would never go on welfare and demand handouts.
As for the posthumous conversions, there's something I don't understand. How can Jews (or Christians) be converted to Mormonism without their even knowing it (due to being dead)? If someone is going to leave the Jewish/Christian faith, don't they have to do it on their own? I'm pretty sure the answer to that question is "yes." If so, then what difference do these hocus pocus ceremonies really make?