Inevitably, when I write about FamilySearch Family Tree or when I previously wrote about New.FamilySearch.org, I get a comment or two accusing The Church of Jesus Christ of Latter-day Saints of some ulterior motive or wrongful actions with respect to the information on the FamilySearch.org website or related sites. I am amazed that there is so much residual anti-Mormon sentiment out there, even among genealogists who ought to know better.
I am absolutely certain that there are a number of people out there in genealogical community that will not only avoid Family Tree, but will vilify the sponsor for deigning to foist such a nefarious scheme on the genealogical community. At the heart of this ill will is a misunderstanding of the Church's teachings and practices concerning proxy Temple ordinances, such as baptism, for deceased relatives.
To the extent I am able to do so, let me set the record straight. I do not speak for the Church, I speak for myself. Individual Church members may not follow Church policy regarding those deceased individuals who qualify for proxy ordinances. But the policy is clear. On February 29, 2012, the Office of the First Presidency of the Church issued a Statement to the Members of the Church reiterating a policy first stated in 1995. Here is a link to the document. The document is publicly available in the Help section of FamilySearch.org if you search for "proxy ordinances policy." The key phrase in this statement is that "Those whose names are submitted for proxy temple ordinances should be related to the submitter."
Family Tree will become the first successful unified online family tree. Unlike the fragmented trees on other websites, with a separate tree for each submitter, the Family Tree will bring together all of the copies of your family tree in one location. Further, unlike other large online family tree sites, you will never have to pay an annual fee to keep your information online. If you are still concerned about the Mormons stealing your information, you need to realize that you are likely related to a Mormon or may soon be and there is no reason why "your" genealogy might not end up in Family Tree after all, even if you decide you are too concerned about the Mormons to allow your genealogy to be entered.
It would be pretty funny, if the people worried about their genealogy were not so serious. Think about it. Suppose you put your genealogy on Ancestry.com. What is to stop some "Mormon" from taking your information off of Ancestry.com? Do you think your ancestry is private? Don't we all have access to the same source documents that you do? If I wanted to do so, couldn't I do a pedigree for you (whoever you are?) and submit your ancestors for proxy ordinances? Assuming of course, that I followed the policy of the Church and were related to you? What is the big deal?
So, if you want to ignore Family Tree for whatever prejudicial reason you may harbor, that is your business. But it is also your loss.