Facebook is too much like having blinders on because people are much more detailed in Christmas cards with an annual letter.
The last two years on Facebook I have had several friends get married and I have found myself asking......"who is this person you married?" You look back at their Facebook and see them at a holiday dinner with their boyfriend/girlfriend, on vacation with them, then they post they are engaged to somebody they have never mentioned on Facebook before. Thanksgiving dinner with boyfriend/girlfriend, getting engaged to someone else at Christmas!
Of course, I forgot to write a Christmas letter this year, and did not realize it until Christmas day. My wife did not remind me and sent our our Christmas cards without even mentioning it. Not sure if SHE forgot too, or just decided it was not work mentioning. And we actually had an active year.