I'll never forget when Ernest Funk, a member of the Canadian branch committee who looks like he's 100 years old, basically yelled into his mike at a district convention that Facebook is evil and how "we are warning you about it". He literally yelled out loud a warning about using Facebook to 2000+ attendees. This was in 2009 I think.
Elders, special pioneers, and bethelites now use it anyway. I've found an old CO on it as well.