It is not the self-portrait that's the problem it's the intention behind it. When we are little we make funny faces in front of the camera and are uninhibited in every way. Hormones hit and we feel the crushing weight of spots, braces, bad hair and glasses, not to mention all the stuff that's going on inside. It is not surprising that they have to fake it to feel pretty enough.
Outsized reaction to celebrity death is not a new thing, it even has its own entry on Wikipedia: Mourning sickness. Its zenith in this country was the death of Diana, Princess of Wales, a period in our history during which we behaved so peculiarly that we still can't look each other in the eye whilst talking about it. A madness took us, like a Bacchanalian orgy, only with less orifice-filling and more commemorative crockery.
In the early 2000s something called 'social media' appeared, a new type of social lubricant for the 21st century that transformed the way society used its free time. For the first time in history people started watching less TV than their elders, turning away from passive consumption and towards active participation
Imagine the situation: you're on the train to a meeting, going over some papers and you need to leave the carriage to go grab a coffee from the buffet car. What do you do with your briefcase? You'll only be gone two minutes and your laptop is safely stowed in the office, so what's the harm in leaving it on your seat?
I gave Facebook my golden years, but what has Facebook ever given me? It has facilitated a lazy approach to keeping in contact with people. Who wants a thoughtfully-written postcard when they can just pop open a message? It has normalised nosiness. It has led my being constantly reminded of those I don't keep in contact with anymore but can't quite bring myself to 'unfriend'.