It's a trend I've noticed recently on Facebook, one I'm sure will get a good workout on Father's Day:
People giving a shout out to their deceased Dad or Mom on Facebook on a special occasion,like a birthday or anniversary. Not just a "let's all remember Dad on his birthday, he would have been 89," but more like, "Hey, Dad,thinking of you on your birthday, miss you, wish you were still with us." So I expect Facebook will be full of such greetings on Father's Day.
I had no idea there were Facebook accounts in Heaven.
(Also, I'd be just a bit scared if Dad answered...)