Twitter is suffering from a systemic harassment problem. This isn’t news—it’s been written about over and over again, and has become a trope in the cultural mainstream. "We suck at dealing with abuse and trolls on the platform, and we’ve sucked at it for years," the company's CEO wrote in an internal memo last year. Recently, Paul Ford summed it up: "Google has search. Facebook has the social network. Twitter has the angry social network."