Wow! These sounds like th catastrophic predictions when steam locomotive and railway started operations 
Things usually take an unexpected way… e.g The Web was created to share knowledge (and it is now sharing hate and silliness as well).
And catastrophic prophecies usually don’t happen
Social media are basically a good thing (bring people together, link remote family members) BUT this has been diverted to catch up our time (marketing money), facilitate the spreading of hate (jihadism) and finally influence masses and manipulate elections and democracy.
All of this is not new… but the web add its own touch:global spread
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