I loved the understated humour of: "Some social scientists believe teaching kids that literally everyone in the world they hadn't met is dangerous may have been actively harmful." Harms take many guises. Mutual distrust drives people to mediate and avoid others through technology as a psychological shield. That breeds bad technology which divides and dehumanises, and feeds the loop. Here on HN some people have argued…
... and the often hilarious scene that ensues when you don't share a common language. Some of my best memories are made of things like this.