Instagram no longer allows adults to send DMs to underage users
In addition to these changes, Instagram will implement prompts to encourage teens to be more careful in conversations with adults they're already connected to. Instagram will notify teens when an adult who has been “exhibiting potentially suspicious behavior” is interacting with them via direct messages.
These messages are usually sent to teens if an adult is sending a large amount of friend or message requests to people under 18, and they include various options like block, report, or restrict the adult in question.
But that's not all! Instagram announced that in the coming weeks it will make it even more difficult for adults who have been “exhibiting potentially suspicious behavior” to interact with underage Instagram users. Many of these changes will be implemented in some countries this month, but they will be available everywhere by the end of the year.