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How to fix the internet
(www.technologyreview.com)
Have they tried turning it off and back on again?
Seriously though, just raise the technical skill barrier to entry. Anything that requires more than idiot-level tech savvy will scare off most of the horrible people that make the internet a horrible place. It didn't even really take off until smartphones were a thing, dropping the barrier to the absolute minimum number of simple steps.
This is a most excellent place for technology news and articles.