Is it possible to make the internet a kinder place? Instagram CEO Kevin Systrom thinks so. In Wired, Nick Thompson reports on how Instagram has been working to clean up its photo sharing platform, creating tools for users to close comments on certain posts and ban offensive words—or, in one notable case, offensive emojis:

In mid July 2016, just after VidCon, Systrom was faced with just such an ophiological scourge. Somehow, in the course of one week, Taylor Swift had lost internet fights with Calvin Harris, Katy Perry, and Kim Kardashian. Swift was accused of treacherous perfidy, and her feed quickly began to look like the Reptile Discovery Center at the National Zoo. Her posts were followed almost entirely by snake emoji: snakes piled on snakes, snakes arranged numerically, snakes alternating with pigs. And then, suddenly, the snakes started to vanish. Soon Swift’s feed was back to the way she preferred it: filled with images of her and her beautiful friends in beautiful swimsuits, with commenters telling her how beautiful they all looked.

But Instagram can’t build that world with simple technical fixes like automated snake emoji deletion.

This was no accident. Over the previous weeks, Systrom and his team at Instagram had quietly built a filter that would automatically delete specific words and emoji from users’ feeds. Swift’s snakes became the first live test case. In September, Systrom announced the feature to the world. Users could click a button to “hide inappropriate comments,” which would block a list of words the company had selected, including racial slurs and words like whore. They could also add custom keywords or even custom emoji, like, say, snakes.

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