> damaging the social fabric without care (Facebook, Instagram, Snapchat, Twitter)

Without Facebook and Snapchat my parents would get something on the order of a written letter once a year and a call on their birthdays. With them they get to see daily life snaps on my story (usually funny things my wife or dog do, but whatever) and weekly Facebook photos of family events. It's much higher fidelity than written communication or phone calls and would make the social fabric stronger, not weaker.