I was assuming he'd died and this was one of those weird quasi-Satanic posthumous conversions.
My favorite is when the Mormons baptized Anne Frank
How do you even baptize a dead person? Dig up their skulls and do the business with the water?
Nope, you have someone stand in for them and do a baptism by proxy. No dead bodies involved. Not only that, it's not even a guaranteed conversion; it simply gives a deceased person the
opportunity to formally accept LDS doctrine and the Church in the afterlife. Sure, it's assumed that they accepted, but they have free will.
As for the Anne Frank thing, yeah, I will admit that baptizing Holocaust victims without the consent of family members is terrible. That is part of why the LDS Church has instituted a policy of only allowing family members of the deceased to baptize/be baptized for them (or people that the family member have authorized). Even those who say they're the family of Holocaust victims have to prove it extensively.
And at this point, the repeated baptisms of Holocaust victims (I think Anne Frank is at baptism number 19 as of 2012 or so) is not the fault of the LDS Church; there are anti-Mormons who somehow trick their bishops to let them stay a member in good standing who specifically seek out Holocaust victims to baptize to make the LDS Church look bad. When I worked at the LDS Church-owned Family History Library, there was literally a photo list of "if you see these people, kick them out" because of their shenanigans. They've been banned from all English-speaking temples, and the only reason they get away with baptizing Anne Frank and other victims is because they go to non-English temples (like say, in Guatemala) that aren't as familiar with names like Anne Frank.
Yes, we do follow the practice of baptisms for the dead (that's mentioned in the New Testament by the way), but we do take precautions with it.
