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Are smart phones destroying our mental health?
(interestingengineering.com)
This is a most excellent place for technology news and articles.
A knife is convenient and accessible as well true, but it is easy to understand that swinging a knife will hurt yourself and/or others.
While social media doesn't have that, we don't automatically identify social media as dangerous unlike swinging a knife or pointing a gun.
I do understand your point that the user is still responsible in some way, I just think that knowledge of its danger be more widespread.