Q: Do you baptize dead bodies?
A: Ewww. No. Absolutely not. Baptizing corpses would be really creepy. *Shudder*
We do perform ordinances for those who have died by proxy (that is, I might stand in for my great-great grandmother or something). Those vicarious ordinances are a large part of what happens in LDS temples around the world. However agency still applies in the afterlife. What I mean is, once a body and spirit are separated (see Life After Death – Part 1) the spirit retains the ability to make choices, to accept or reject these ordinances. No one is ever forced to become Mormon! Such a thing would inherently be contrary to the nature of God. Being baptized in and of itself does not constitute “Mormonism”. The person who the ordinance is performed for must always exercise faith and repentance before the ordinance of baptism will have any pertinence.
I certainly hope that clarifies that for you and anyone else wondering. I personally find this to be a beautiful doctrine and one for which I am very, very grateful. When understood, I feel it makes a lot of sense as well as being fair and loving. If you’d like to know more, I recommend these other articles from our site:

and I marveled at the simplicity and depth of my son’s faith. I know that he believes and accepts what I’m teaching him. I know that he loves his Redeemer, Jesus Christ. My son was taking my lesson to heart and applying it to his sphere of understanding. Would that we all prayed with such faith! Would that we never doubted that our omnipotent Father in Heaven cares about us and whatever we may be experiencing. I know this to be true. Jesus is the Christ, he suffered for your sins, died for you and was resurrected again because of that great love that our Father has for each and every one of us. Just as my son prayed for help to get through what he truly saw as a difficulty in his world, we can pray for any difficulty in our world and I know our prayers will be answered.
To the first part, no; we do not pray to the dead. We pray to God the Eternal Father. We believe in His Son, Jesus Christ and we end our prayers in Jesus’ name. We believe that the Father and the Son are both very much alive.