On my kids urging, I signed up and have discovered that I now know more about what they are doing than I ever did before.
My godkids wouldn't dream of communicating with me any other way. Actually, one of them doesn't even there. But if I occasionally post something directly to his timeline, he at least condescends to "like" it. Sometimes.
I don't even put out "welcome" matts by my front door because I don't want people to get the wrong idea.
And here I'd thought I was the only one!