If you were to rank all the ways humans can inflict harm on one another, ranked by severity, it might be a few pages before you got to “intentional inducement of FOMO.”

Purposefully giving someone else FOMO — fear of missing out — is not a crime, or even a misdemeanor. But it is a big problem on Instagram, where millions of teenagers go every day to check on their peers. And it is one of the subtle slights that Instagram is focused on classifying as part of its new anti-bullying initiative, which will use a combination of artificial intelligence and human reviewers to try to protect its youngest users from harassment and pain.

The anti-bullying effort is part of a larger attempt by Instagram and its parent company, Facebook, to clean themselves up. Both platforms have struggled to contain a flood of toxic behavior, extreme content and misinformation on their services.

Instagram is particularly vulnerable because of its young user base. About 70 percent of American teenagers use the service, according to the Pew Research Center. And 42 percent of cyberbullying victims ages 12 to 20 reported being bullied on Instagram, according to a 2017 survey by the British anti-bullying organization Ditch the Label.