The world is a strange place also and folks can be quite unpredictable, I suspect some folks would get a little upset if broadcasting your own demise and the mountain rescue got there before you didn't pass away. They would have seen it all as being a little over dramatic if you survived unscathed and it probably doesn't do much for the WTL either at that point in time. It would probably be a better tactic to just record your last thoughts and goodbyes to real friends and family etc using the video camera on the smart phone to be found later when your body is recovered.
What does that have to do with the efficacy of Facebook and Twitter as a means of communication? Also, what does that have to do with I said? You're basically making up stuff and arguing with yourself.