I enjoyed Family Search when I first started using it but it's horrendous that verified, documented family lines can be removed at anyone's whim. It just isn't worth the hassle to argue with people. I know there's a better site run by the Morman's that's more accurate and info can't be readily changed. But only members of the church have access. I would pay to have access to it but it isn't available.
I'll give 3 examples of my frustration,
1: The woman that continually changes my mother's info insisting that she died in NY and that she wasn't my mother. She died in Colorado and most definitely was my mother.
2: The person who doesn't like that my great-great grandfathers date of birth varies by 2 years depending on which record you believe and keeps deleting his info thereby erasing his entire line. I have 16 documents proving he is who I say he is and the difference in dates is between a doctors ledger of his birth and a baptismal certificate. A minor issue but he's continually deleted.
3: This one is the strangest one but I've heard other people have run into similar issues. There is a person who doesn't like that one of our family trees goes back to a King that she feels was unchristian and doesn't want him in her line. So she keeps deleting the whole line.
I've read about people who have said they've had lines erased because others don't want anyone who has been divorced in there line.
It's an ok site to find info but it's much better to use it as a resource and build your own tree through a different site.