This is all well said -- I'm in a bit of the "it's the behavior AND it's the platform" space (not that Twitter is uniquely toxic, but that each platform enables particular ways to be toxic). I definitely think you're on to something about scarcity structural issues in the publishing industry being at the heart of it. In a healthy industry where publishers were actually able to support a substantial number of writers and didn't essentially require authors to do their own heavy lifting through social media then we just wouldn't be in the position where this stuff had such stakes.