Del Harvey sees too many of the same kind of tweet. It contains a screenshot of a message from Twitter’s user support, saying that a post someone reported as abusive on the site doesn’t violate Twitter rules. It’s often accompanied by commentary: “Seriously?” For Harvey, it’s a personal criticism. She’s the head of trust and safety at Twitter, and it’s her job to make sure that people have tools to deal with harassment and abuse on the social-media site.

But during the course of her eight years at the company, she said, “It’s very easy to find instances where we got to the wrong answer.” That’s an understatement. Twitter’s failure to curb harassment has been a main complaint of users, and was one reason the company failed to get a bid from potential acquirers when it was exploring a sale. READ MORE