I'm glad my family has honored my requests to keep off Facebook any notice of my double hospital trip this year. The last thing I want to see/receive are lots of comments from people (many, many more than just my family) praying for me. That's what a lot of them would do -- in spades.
That's not the same thing as my point. Like, I asked my mother not to send me religious crap, or forward religious crap to my e-mail or phone but if, as separate, wants to pray for me, I don't care, that doesn't effect me because that's her on her, I'm only involved in her mind rather than being actually involved. However, if she sends me something, then I'm directly involved.
If I am alive and you are on Facebook and hospitalized, I will not return the favor of a prayer. People who give prayers think they need prayers and if you don't give them what they think they need, they think you are less of a human.
I have an account but I rarely go there. Just like with Myspace (which is still around), have an account, many friends, rarely go there.
However, if you 'friend' family, and friends who are religious then you agreed to welcome their messages, no matter what they are, including religious unless, like with my mother: you ask them not to.
Facebook is like organized school prayer.
I wouldn't know but I doubt most of it is. Though, I do find that more older people use Facebook than they may have used Myspace. There wasn't a movie about Myspace, and I don't think the owner became a billionaire.